# US 9,752,902 B2 · Apparatus with timed color change indication

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- Number: US 9,752,902 B2
- Document ID: US9752902B2
- Status: Granted
- Kind: B2
- Application number: 14/847,182
- Filed: 2015-09-08
- Published: 2015-12-31
- Granted: 2017-09-05
- Earliest claimed: 2006-11-30
- Assignees: Sensor International, LLC
- Applicants: Sensor International, LLC
- Inventors: Gregory Lee Heacock; Louise Ellen Culham
- Web page: https://patentgrep.com/patent/US9752902B2

## CPC

- G01D 7/005: {Indication of measured value by colour change}
- A61B 17/3211: Surgical scalpels, knives; Accessories therefor
- A61B 90/92: coded with colour
- G02C 7/04: Contact lenses for the eyes (disinfection or sterilisation of contact lenses A61L12/00)
- G02C 7/049: {Contact lenses having special fitting or structural features achieved by special materials or material structures}
- G02C 7/104: {having spectral characteristics for purposes other than sun-protection}
- G02C 7/108: {Colouring materials}
- A61B 3/16: for measuring intraocular pressure, e.g. tonometers
- A61B 2090/0807: {Indication means}
- A61B 2090/0814: {Preventing re-use}
- A61M 5/002: {Packages specially adapted therefor, e.g. packages for syringes or needles or kits for diabetics}
- A61M 5/3129: {Syringe barrels (A61M5/3205, A61M5/50 take precedence)}
- A61M 5/5086: {for indicating if defective, used, tampered with or unsterile}
- A61M 2205/583: by visual feedback
- G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G02C: SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES (trial frames for testing the eyes A61B3/04; goggles or eyeshields not having the same features as spectacles A61F9/00)
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

A disposable ophthalmic or medical apparatus has a portion with a color changeable dye disposed thereon. The dye changes color after being exposed to oxygen for a controlled and predetermined period of time indicating that the apparatus should no longer be used.

## Claims

### Claim 1

An apparatus with time controlled color change indication comprising:
a disposable, limited or restricted use product; and
an oxygen sensing color changeable dye, the dye changing color after exposure to atmospheric oxygen for a defined time
wherein the dye comprises a time-delay component to delay the time at which the dye changes color and
wherein the dye indicates the condition of the disposable, limited or restricted use product.

### Claim 2 (depends on 1)

An apparatus as recited in claim 1 wherein the time-delay component is wax.

### Claim 3 (depends on 1)

An apparatus as recited in claim 1 wherein the time-delay component is Iron (II) carbonate.

### Claim 4 (depends on 1)

An apparatus as recited in claim 1 wherein the dye comprises Methylene Blue or Safranine T.

### Claim 5 (depends on 4)

An apparatus as recited in claim 4 wherein the dye further comprises glucose and sodium hydroxide.

### Claim 6 (depends on 4)

An apparatus as recited in claim 4 wherein the time-delay component is wax or Iron (II) carbonate.

### Claim 7 (depends on 5)

An apparatus as recited in claim 5 wherein the dye further comprises methyl cellulose or acacia gum.

### Claim 8 (depends on 1)

An apparatus as recited in claim 1 wherein the time-delay component is wax and Iron (II) carbonate.

### Claim 9 (depends on 1)

An apparatus as recited in claim 1 wherein the dye is disposed on the disposable, limited, or restricted use product.

### Claim 10 (depends on 1)

An apparatus as recited in claim 1 wherein the disposable, limited or restricted use product is a medical device.

### Claim 11 (depends on 10)

An apparatus as recited in claim 10 wherein the medical device is a scalpel.

### Claim 12 (depends on 10)

An apparatus as recited in claim 10 wherein the medical device is a syringe.

### Claim 13 (depends on 10)

An apparatus as recited in claim 10 wherein the medical device is an ophthalmic lens.

### Claim 14 (depends on 1)

An apparatus as recited in claim 1 wherein said wherein the disposable, limited or restricted use product is a medicament.

### Claim 15 (depends on 14)

An apparatus as recited in claim 14 wherein said product is a pill.

### Claim 16 (depends on 1)

An apparatus as recited in claim 1 wherein said apparatus is a packaging.

### Claim 17 (depends on 16)

An apparatus of claim 16 wherein the dye is disposed on a portion of the packaging.