US2692267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phthalimide derivatives of 2, 2'-di-amino-4, 4'-bithiazole
Assignee: EIDP Inc
•
Filing: 1952-11-04
•
Granted: 1954-10-19
•
Expires: 1972-11-04
Abstract
No abstract record available.
Inventors
- 👤 John B Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:07
CPC Classifications
C; C07; C07D; C07D417/00; C07D417/14; C09; C09B; C09B57/00; C09B57/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
AN ORGANIC COMPOUND OF THE GENERAL FORMULA
Claim 2
Dependent Claim
7 words
AN ORGANIC COMPOUND OF THE GENERAL FORMULA
References Cited (Backward Citations)
US2396893A
Cited
US2537352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-18 | 1958-04-19 | 1958-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-18 | 1962-04-19 | 1962-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-18 | 1966-04-19 | 1966-10-19 | $7700.00 | Window Closed / Lapsed |