Patent US2915480A successfully refreshed from Google Patents.
US2915480A
Expired / Lapsed
US
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Aziridine-carboxylic acid polymers
Assignee: Individual
•
Filing: 1956-12-04
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Granted: 1959-12-01
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Expires: 1976-12-04
Abstract
No abstract record available.
Inventors
- 👤 Wilson A Reeves
- 👤 Jr George L Drake
- 👤 John D Guthrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:26
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/667; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2672; Y10T442/268
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PROCESS FOR PRODUCING FLAME-PROOF POLYMERS WHICH COMPRISES MIXING AN AZIRIDINYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF A 1-AZIRIDINYL PHOSPHINE OXIDE CONTAINING AT LEAST TWO 1-AZIRIDINYL GROUS, A 1AZIRIDINYL PHOSPHINE SULFIDE CONTAINING AT LEAST TWO 1AZIRIDINYL GROUPS, AND MIXTURES THEREOF WITH A CARBOXYLIC ACID, THE CARBOXYLIC ACID GROUPS CONSTITUTING THE ONLY GROUPS IN SAID ACID REACTIVE WITH THE AZIRIDINYL GROUPS OF SAID AZIRIDINYL COMPOUND, AND PERMITTING THE AZIRIDINYL COMPOUND AND THE ACID TO REACT WITH EACH OTHER UNTIL A POLYMERIC REACTION PRODUCT IS PRODUCED, THE AMOUNT OF ACID VARYING FROM ABOUT 2% BY WEIGHT OF THE AZIRIDINYL COMPOUND TO SUCH AMOUNTS AS WILL PROVIDE ABOUT ONE CARBOXY GROUP PER AZIRIDINYL GROUP.
Claim 2
Dependent Claim
112 words
A PROCESS FOR PRODUCING FLAME-PROOF POLYMERS WHICH COMPRISES MIXING AN AZIRIDINYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF A 1-AZIRIDINYL PHOSPHINE OXIDE CONTAINING AT LEAST TWO 1-AZIRIDINYL GROUS, A 1AZIRIDINYL PHOSPHINE SULFIDE CONTAINING AT LEAST TWO 1AZIRIDINYL GROUPS, AND MIXTURES THEREOF WITH A CARBOXYLIC ACID, THE CARBOXYLIC ACID GROUPS CONSTITUTING THE ONLY GROUPS IN SAID ACID REACTIVE WITH THE AZIRIDINYL GROUPS OF SAID AZIRIDINYL COMPOUND, AND PERMITTING THE AZIRIDINYL COMPOUND AND THE ACID TO REACT WITH EACH OTHER UNTIL A POLYMERIC REACTION PRODUCT IS PRODUCED, THE AMOUNT OF ACID VARYING FROM ABOUT 2% BY WEIGHT OF THE AZIRIDINYL COMPOUND TO SUCH AMOUNTS AS WILL PROVIDE ABOUT ONE CARBOXY GROUP PER AZIRIDINYL GROUP.
References Cited (Backward Citations)
DE863055C
Cited
DE854651C
Cited
DE888853C
Cited
US2606901A
Cited
US2672459A
Cited
US2654738A
Cited
US2682521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |