US2901444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers made from 1-aziridinyl phosphine oxides and sulfides and flame resistant organic textiles
Assignee: Individual
•
Filing: 1956-06-05
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Granted: 1959-08-25
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Expires: 1976-06-05
Abstract
No abstract record available.
Inventors
- 👤 Leon H Chance
- 👤 Jr George L Drake
- 👤 Wilson A Reeves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:15
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0246; C08G79/00; C08G79/02; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/667
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A PROCESS FOR PRODUCING A FLAME RESISTANT POLYMER WHICH COMPRISES HEATING IN AN AQUEOUS ALKALINE MEDIUM, A MATERIAL SELECTED FROM THE GROUP CONSISTING OF TRIS(1AZIRIDINYL) PHOSPHINE OXIDE, TRIS(1-AZIRIDINYL) PHOSPHINE SULFIDE, AND MIXTURES THEREOF UNTIL POLYMERIZATION TAKES PLACE.
Claim 2
Dependent Claim
37 words
A PROCESS FOR PRODUCING A FLAME RESISTANT POLYMER WHICH COMPRISES HEATING IN AN AQUEOUS ALKALINE MEDIUM, A MATERIAL SELECTED FROM THE GROUP CONSISTING OF TRIS(1AZIRIDINYL) PHOSPHINE OXIDE, TRIS(1-AZIRIDINYL) PHOSPHINE SULFIDE, AND MIXTURES THEREOF UNTIL POLYMERIZATION TAKES PLACE.
References Cited (Backward Citations)
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US2660543A
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US2582613A
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US2666750A
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US2606901A
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US2672459A
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US2654738A
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US2682521A
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US2772188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |