US2677678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated benzoic acid derivatives
Assignee: Shell Development Co
•
Filing: 1953-03-17
•
Granted: 1954-05-04
•
Expires: 1973-03-17
Abstract
No abstract record available.
Inventors
- 👤 Rupert C Morris
- 👤 Vernon W Buls
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:15
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/02; C08F18/04; C08F18/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A COMPOUND HAVING THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
35 words
A COPOLYMER OF THE COMPOUND DEFINED IN CLAIM 5 WITH ANOTHER POLYMERIZABLE ORGANIC COMPOUND HAVING AN ALIPHATIC GROUP OF TWO CARBON ATOMS WHICH ARE CONNECTED TOGETHER WITH AN OLEFINIC LINKAGE CAPABLE OF UNDERGOING ADDITION POLYMERIZATION.
References Cited (Backward Citations)
US2578950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |