US2989515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of copolymerizing aromatic dienes and monoolefins with catalyst of metal halide and organometal compound
Assignee: EIDP Inc
•
Filing: 1956-08-13
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Granted: 1961-06-20
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Expires: 1976-08-13
Abstract
No abstract record available.
Inventors
- 👤 Bruton James Donald
- 👤 Gresham William Franklin
- 👤 Mcpherson James Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:37
CPC Classifications
C; C08; C08F; C08F210/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
THE PROCESS OF POLYMERIZING AN AROMATIC MONOMER HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
11 words
THE PROCESS OF POLYMERIZING AN AROMATIC MONOMER HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2089444A
Cited
US2213423A
Cited
GB497643A
Cited
US2378195A
Cited
US2405817A
Cited
US2609363A
Cited
GB682771A
Cited
US2699457A
Cited
US2731450A
Cited
US2773052A
Cited
BE538782A
Cited
US2721189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |