US3159628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pteridine-5-oxide derivatives
Assignee: Smith Kline & French Laboratories Ltd
•
Filing: 1962-05-28
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Granted: 1964-12-01
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Expires: 1982-05-28
Abstract
No abstract record available.
Inventors
- 👤 Irwin J Pachter
- 👤 Weinstock Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:22
CPC Classifications
C; C07; C07D; C07D475/00; C07D475/06; C07D475/10; C07D475/02; C07D475/04; C07D475/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
A COMPOUND OF THE STRUCTURE:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE STRUCTURE:
Claim 3
Dependent Claim
5 words
A COMPOND OF THE STRUTURE:
Claim 4
Dependent Claim
5 words
A COMPOND OF THE STRUTURE:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |