US 5,854,177 AGranted

Method for enhanced hydroponic plant productivity with polymeric acids

AssigneeDonlar Corporation

InventorsLarry P. Koskan, Abdul Rehman Y. Meah, J. Larry Sanders, Robert J. Ross

Life of this patent

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Abstract

Plant productivity in a hydroponic medium is enhanced by the addition of a water-soluble, non-biodegradable, non-peptidal polymeric acid having a molecular size larger than about 1,500 Daltons.

Claims16

Dependent claims

A method for enhancing plant productivity which comprises supplying to a plant in a hydroponic medium a productivity enhancing amount of a substantially water-soluble, non-biodegradable non-peptidal polymeric acid, the polymeric acid having a molecular size larger than about 1,500 Daltons.

Dependencies are inferred from the claim text.

Facts

Application: 08/781,413Filed 10 Jan 1997 · continuation in part
Priority: 5 Nov 1992
Granted: 29 Dec 1998
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

A01N 3/02
Preservation of plants or parts thereof, e.g. inhibiting evaporation, improvement of the appearance of leaves or protection against physical…:…
A01N 37/04
Saturated carboxylic acids or thio analogues thereof; Derivatives thereof: polybasic
A01N 37/46
Containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton…
A01N 41/04
Containing a sulfur-to-oxygen double bond: sulfonic acids; Derivatives thereof

Family

Serial972,375Parent of this continuation-in-part · filed 5 Nov 1992
Serial313,436Parent of this continuation-in-part · filed 27 Sep 1994
US 5,593,947 AParent of this continuation-in-part
US 5,350,735 AParent of this continuation-in-part
US 5,854,177 AThis patent

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

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Abstract

Plant productivity in a hydroponic medium is enhanced by the addition of a water-soluble, non-biodegradable, non-peptidal polymeric acid having a molecular size larger than about 1,500 Daltons.

Facts

Application

08/781,413Filed 10 Jan 1997 · continuation in part

Priority

5 Nov 1992

Granted

29 Dec 1998

Term ends

Not estimatedThe source records don’t support an estimate.

Classification12 codes

A01N 3/02
Preservation of plants or parts thereof, e.g. inhibiting evaporation, improvement of the appearance of leaves or protection against physical…:…
A01N 37/04
Saturated carboxylic acids or thio analogues thereof; Derivatives thereof: polybasic
A01N 37/46
Containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton…
A01N 41/04
Containing a sulfur-to-oxygen double bond: sulfonic acids; Derivatives thereof

Family

Serial972,375Parent of this continuation-in-part · filed 5 Nov 1992

Serial313,436Parent of this continuation-in-part · filed 27 Sep 1994

US 5,593,947 AParent of this continuation-in-part

US 5,350,735 AParent of this continuation-in-part

US 5,854,177 AThis patent

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