US3316255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrimidopyrimidothiazine compounds and production thereof
Assignee: Shionogi and Co Ltd
•
Filing: 1965-02-23
•
Granted: 1967-04-25
•
Expires: 1985-02-23
Abstract
No abstract record available.
Inventors
- 👤 Takamizawa Akira
- 👤 Sato Yoshiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:54
CPC Classifications
C; C07; C07D; C07D417/00; C07D417/02; C07D417/04; C07D415/00; C07D513/00; C07D513/12; C07D513/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
A PYRIMIDOPYRIMIDOTHIAZINE COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
6 words
A PYRIMIDOPYRIMIDOTHIAZINE COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
10 words
A PROCESS FOR PREPARING A PYRIMIDOPYRIMIDOTHIAZINE COMPOUND OF THE FORMULA:
Claim 4
Dependent Claim
10 words
A PROCESS FOR PREPARING A PYRIMIDOPYRIMIDOTHIAZINE 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) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |