US2952677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aminoguanadine compounds
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1957-09-17
•
Granted: 1960-09-13
•
Expires: 1977-09-17
Abstract
No abstract record available.
Inventors
- 👤 Birtwell Stanley
- 👤 Maisey Roy Frederick
- 👤 Richardson Dora Nellie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:26
CPC Classifications
C; C07; C07C; C07C281/00; C07C281/16; C07C281/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A GUANIDINE COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
6 words
A GUANIDINE COMPOUND OF THE FORMULA:
References Cited (Backward Citations)
US2703322A
Cited
US2727041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |