US2535968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heterocyclic guanamines
Assignee: Wyeth Holdings LLC
•
Filing: 1945-04-13
•
Granted: 1950-12-26
•
Expires: 1965-04-13
Abstract
No abstract record available.
Inventors
- 👤 Thurston Jack Theo
- 👤 Kaiser Donald William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:43
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/02; C07D401/04; C07D251/00; C07D251/02; C07D251/12; C07D251/14; C07D251/16; C07D251/18; C07D403/00; C07D403/02; C07D403/04; C07D405/00; C07D405/02; C07D405/04; C07D405/06; C07D405/10; C07D409/00; C07D409/02; C07D409/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
HETEROCYCLIC SUBSTITUTED GUANAMINES HAVING THE FORMULA
Claim 2
Dependent Claim
6 words
HETEROCYCLIC SUBSTITUTED GUANAMINES HAVING THE FORMULA
References Cited (Backward Citations)
US2437691A
Cited
US2302162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |