US3312690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sydnonimine derivatives
Assignee: Takeda Pharmaceutical Co Ltd
•
Filing: 1966-04-29
•
Granted: 1967-04-04
•
Expires: 1986-04-29
Abstract
No abstract record available.
Inventors
- 👤 Masuda Katsutada
- 👤 Imashiro Yoshio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:33
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/22; C07D295/28; C07D295/30; C07D271/00; C07D271/02; C07D271/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
6 words
A SYDNONIMINE COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
6 words
A SYDNONIMINE COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
6 words
A NITROSO COMPOUND OF THE FORMULA
Claim 4
Dependent Claim
6 words
A NITROSO COMPOUND OF THE FORMULA
Claim 5
Dependent Claim
7 words
AN N-CYANOALKYL HYDRAZINE COMPOUND OF THE FORMULA
Claim 6
Dependent Claim
7 words
AN N-CYANOALKYL HYDRAZINE COMPOUND OF THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |