Patent US3186998A successfully refreshed from Google Patents.
US3186998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3, 4-disubstituted-1, 2, 5-thiadiazolidine-1, 1-dioxide compounds
Assignee: Pharmacia and Upjohn Co
•
Filing: 1963-05-13
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Granted: 1965-06-01
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Expires: 1983-05-13
Abstract
No abstract record available.
Inventors
- 👤 John B Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:10
CPC Classifications
C; C07; C07D; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
3,4-DISUBSTITUTED-1,2,5-THIADIAZOLIDINE-1,1-DIOXIDE OF THE FORMULA
Claim 2
Dependent Claim
4 words
3,4-DISUBSTITUTED-1,2,5-THIADIAZOLIDINE-1,1-DIOXIDE OF THE FORMULA
References Cited (Backward Citations)
US2205558A
Cited
US2624729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |