US2926166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrido (2, 3-d) pyrimidine compounds and method of making
Assignee: SmithKline Beecham Corp
•
Filing: 1958-01-09
•
Granted: 1960-02-23
•
Expires: 1978-01-09
Abstract
No abstract record available.
Inventors
- 👤 George H Hitchings
- 👤 Roland K Robins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:59
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A PYRIDO (2,3-D) PYRIMIDINE OF THE GENERAL FORMULA
Claim 2
Dependent Claim
8 words
A PYRIDO (2,3-D) PYRIMIDINE OF THE GENERAL 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) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |