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US2881164A
Expired / Lapsed
US
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Ribofuranosyl derivatives of 6-aralkylamino and 6-heterocyclicalkylaminopurines
Assignee: Wyeth Holdings LLC
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Filing: 1955-07-18
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Granted: 1959-04-07
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Expires: 1975-07-18
Abstract
No abstract record available.
Inventors
- 👤 Kissman Henry Marcell
- 👤 Weiss Martin Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:34
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
RIBOFURANOSYLPURINE COMPOUNDS HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
6 words
RIBOFURANOSYLPURINE COMPOUNDS HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2719843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |