US 4,137,194 AGranted

Capsular products

AssigneePolaroid Corporation

InventorWilliam J. McCune, Jr.

Life of this patent

Estimating the term…

Abstract

Microscopic capsules comprising a nucleus surrounded by a film-forming polymeric layer having a substantially continuous light-reflecting metallic coating thereover.

Claims3

Dependent claims

Microscopic capsules consisting essentially of a substantially continuous film-forming polymeric layer surrounding a nucleus comprising a color-providing substance, said polymeric layer having a substantially continuous metallic layer thereover.

Dependencies are inferred from the claim text.

Facts

Application: 04/836,333Filed 25 Jun 1969 · division
Priority: 9 May 1961
Granted: 30 Jan 1979
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G03C 1/002
Photosensitive materials: containing microcapsules
B01J 13/22
After-treatment of capsule walls, e.g. hardening: coating
G03C 8/426
Structural details: structures with microcapsules
Y10T 428/2984
Particulate matter [e.g., sphere, flake, etc.]: microcapsule with fluid core [includes liposome]

Family

Serial108,774Parent of this continuation-in-part · filed 9 May 1961
Serial545,333Parent of this division · filed 26 Apr 1966
3468662Parent of this division
3276869Parent of this continuation-in-part
US 4,137,194 AThis patent

From the US filing history. Foreign family members aren’t listed.

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