US2976291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethers of z
Assignee: —
•
Filing: —
•
Granted: 1961-03-21
•
Expires: 1978-03-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:29
CPC Classifications
C; C07; C07D; C07D405/00; C07D405/02; C07D405/12; C07D211/00; C07D211/04; C07D211/06; C07D211/08; C07D211/18; C07D211/20; C07D211/22; C07D211/26; C07D211/36; C07D211/56; C07D211/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A MEMBER OF THE CLASS CONSISTING OF THE RACEMATES AND OPTICALLY ACTIVE ISOMERS OF COMPOUNDS OF THE FORMULA:
Claim 2
Dependent Claim
18 words
A MEMBER OF THE CLASS CONSISTING OF THE RACEMATES AND OPTICALLY ACTIVE ISOMERS OF COMPOUNDS 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) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |