US3888799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorophosphazene polymers curable at room temperature
Assignee: Horizons Inc
•
Filing: 1972-09-07
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Granted: 1975-06-10
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Expires: 1992-09-07
Abstract
Abstract Improved P-N polymers in which at least some of the groups attached to the P atom contain reactive sites whereby the properties and the polymer may be modified by crosslinking and/or curing.
Inventors
- 👤 Selwyn H Rose
- 👤 Kennard A Reynard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:09
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/02; C08G79/025; C08L; C08L85/00; C08L85/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
10 words
TERPOLYMERS HAVING RANDOMLY DISTRIBUTED REPEATING UNITS REPRESENTED BY THE FORMULAE:
Claim 2
Dependent Claim
10 words
TERPOLYMERS HAVING RANDOMLY DISTRIBUTED REPEATING UNITS REPRESENTED BY THE FORMULAE:
Claim 3
Dependent Claim
10 words
Terpolymers as described in claim 1 wherever W is OH.
Claim 4
Dependent Claim
69 words
The process consisting of partially hydrolyzing a (PNCl2)n linear polymer with a small amount of water in an inert solvent under basic conditions to form an (NPCl2-NP(OH)2)n copolymer in which the ratio of Cl:OH is >5:1 and then reacting the said copolymer with a slight excess of at least one alkali metal fluoroalkoxide, to form phosphonitrile polymers of claim 1 containing a small quantity of a reactive -OH moiety.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |