US3014900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of ketosidopurines
Assignee: Pharmacia and Upjohn Co
•
Filing: 1959-01-26
•
Granted: 1961-12-26
•
Expires: 1979-01-26
Abstract
No abstract record available.
Inventors
- 👤 Schroeder William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:53
CPC Classifications
C; C07; C07H; C07H13/00; C07H13/02; C07H13/04; C07H13/08; C07H19/00; C07H19/02; C07H19/04; C07H19/16; C07H19/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A PROCESS FOR THE PREPARATION OF A KETOSIDOPURINE HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
12 words
A PROCESS FOR THE PREPARATION OF A KETOSIDOPURINE HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2719843A
Cited
US2830985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |