US2636885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted benzofuranes
Assignee: GAF Chemicals Corp
•
Filing: 1952-04-30
•
Granted: 1953-04-28
•
Expires: 1972-04-30
Abstract
No abstract record available.
Inventors
- 👤 Robert W Wynn
- 👤 Samuel A Glickman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:38
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/78; C07D307/79; C07D307/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |