US2666762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of 3-amino-2, 3-dihydroxy-thionaphthene-1, 1-dioxide and processes for preparing the same
Assignee: GD Searle LLC
•
Filing: 1951-04-27
•
Granted: 1954-01-19
•
Expires: 1971-04-27
Abstract
No abstract record available.
Inventors
- 👤 John W Cusic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:31
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/50; C07D333/52; C07D333/62; C07D333/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A MEMBER OF THE CLASS OF COMPOUNDS CONSISTING OF 2,3-DIHYDROTHIONAPHTENE-1,1-DIOXIDE DERIVATIVES OF THE FOLLOWING STRUCTURAL FORMULA
Claim 2
Dependent Claim
16 words
A MEMBER OF THE CLASS OF COMPOUNDS CONSISTING OF 2,3-DIHYDROTHIONAPHTENE-1,1-DIOXIDE DERIVATIVES OF THE FOLLOWING STRUCTURAL FORMULA
References Cited (Backward Citations)
US2557673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |