US2917484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers
Assignee: Celanese Corp
•
Filing: 1956-02-08
•
Granted: 1959-12-15
•
Expires: 1976-02-08
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Kray
- 👤 Brown Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:29
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G2/00; C08G2/06; C08G2/18; C08G4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
PROCESS FOR THE PRODUCTION OF RESINOUS PRODUCTS WHICH COMPRISES REACTING, BY HEATING, A DIALLYLIDENE PENTAERYTHRITOL WITH A POLYCARBOXYLIC ACID HAVING, AS ITS REACTIVE GROUPS, 2 TO 6 CARBOXYLIC ACID GROUPS, THE PROPORTIONS IN THE REACTION MIXTURE BEING ON THE ORDER OF THOSE PROVIDING ONE REACTIVE CARBOXYLIC ACID GROUP PER REACTIVE ALLYLIDENE GROUP, TO PRODUCE A POLYMER.
Claim 2
Dependent Claim
56 words
PROCESS FOR THE PRODUCTION OF RESINOUS PRODUCTS WHICH COMPRISES REACTING, BY HEATING, A DIALLYLIDENE PENTAERYTHRITOL WITH A POLYCARBOXYLIC ACID HAVING, AS ITS REACTIVE GROUPS, 2 TO 6 CARBOXYLIC ACID GROUPS, THE PROPORTIONS IN THE REACTION MIXTURE BEING ON THE ORDER OF THOSE PROVIDING ONE REACTIVE CARBOXYLIC ACID GROUP PER REACTIVE ALLYLIDENE GROUP, TO PRODUCE A POLYMER.
References Cited (Backward Citations)
US2255313A
Cited
US2687407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |