Patent US4124657A successfully refreshed from Google Patents.
US4124657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Room temperature cured elastomer
Assignee: United States Department of the Navy
•
Filing: 1977-03-25
•
Granted: 1978-11-07
•
Expires: 1997-03-25
Abstract
Abstract Hydroxy terminated polybutadiene is reacted with naphthyl-potassium and 1omo-2,4-pentadiene in successive steps to form a bis(1,3-pentadienyl ether) derivative. Then the bismaleimide of dimer diamine is added to the polybutadiene derivative whereby a room temperature cure to an elastomer is achieved.
Inventors
- 👤 Eugene C. Martin
- 👤 Arnold Adicoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:48
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/30; C08C19/34; C08C19/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
The derivative produced by reacting hydroxy terminated polybutadiene with naphthyl-potassium in dimethoxyethane to form a first product and then reacting said first product with 1-bromo-2,4-pentadiene.
Claim 2
Dependent Claim
25 words
The derivative produced by reacting hydroxy terminated polybutadiene with naphthyl-potassium in dimethoxyethane to form a first product and then reacting said first product with 1-bromo-2,4-pentadiene.
References Cited (Backward Citations)
US3758426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |