US4000137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antitumor derivatives of periodate-oxidized nucleosides
Assignee: Wyeth LLC
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Filing: 1975-06-10
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Granted: 1976-12-28
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Expires: 1995-06-10
Abstract
Abstract The reaction of the periodate oxidation product from inosine, adenosine, or cytidine with methanol or ethanol affords a product having activity against lymphocytic leukemia P388 in mice.
Inventors
- 👤 William Dvonch
- 👤 Harvey E. Alburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:08
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/06; C07H19/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
12 words
A compound of the formula ##STR4## wherein R is methyl or ethyl.
Claim 2
Dependent Claim
12 words
A compound of the formula ##STR4## wherein R is methyl or ethyl.
Claim 3
Dependent Claim
10 words
A compound as defined in claim 1 which is 9-[3(5)-hydroxy-6-hydroxymethyl-5(3)-methoxy-p-dioxan-2-yl]-9H-purin-6-ol.
Claim 4
Dependent Claim
10 words
A compound as defined in claim 1 which is 9-[3(5)-ethoxy-5(3)-hydroxy-6-hydroxymethyl-p-dioxan-2-yl]-9H-purin-6-ol.
Claim 5
Dependent Claim
10 words
A compound as defined in claim 1 which is 6-amino-9-[3(5)-hydroxy-6-hydroxymethyl-6(3)-methoxy-p-dioxan-2-yl]-9H-purine.
Claim 6
Dependent Claim
10 words
A compound as defined in claim 1 which is 6-amino-[3(5)-ethoxy-5(3)-hydroxy-6-hydroxymethyl-p-dioxane-2-yl]-9H-purine.
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) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |