US3194787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of phosphonitrilic polymers
Assignee: WALKER CHEMICAL Co Ltd
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Filing: 1961-01-23
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Granted: 1965-07-13
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Expires: 1981-01-23
Abstract
No abstract record available.
Inventors
- 👤 Redfarn Cyril Aubrey
- 👤 Apley Martin
- 👤 Alexander James Ranald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:34
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/28; B; B32; B32B; B32B27/00; C08G79/00; C08G79/02; C08G79/025; C08J; C08J5/00; C08J5/04; C08J5/0405; C08J5/043; C08J2385/00; C08J2385/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A PROCESS FOR THE PRODUCTION OF POLYMERIC SUBSTANCES WHICH COMPRISES HEATING A POLYMERIC CHLORINE-FREE ALKOXYLATED PHOSPHONITRILIC COMPOUND UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, WITH AN AMOUNT OF A POLYHYROXY AROMATIC HYDROCARBON SUFFICIENT TO PRODUCE A POLYMERIZABLE PRODUCT.
Claim 2
Dependent Claim
35 words
A PROCESS FOR THE PRODUCTION OF POLYMERIC SUBSTANCES WHICH COMPRISES HEATING A POLYMERIC CHLORINE-FREE ALKOXYLATED PHOSPHONITRILIC COMPOUND UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, WITH AN AMOUNT OF A POLYHYROXY AROMATIC HYDROCARBON SUFFICIENT TO PRODUCE A POLYMERIZABLE PRODUCT.
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) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |