Patent US3284440A successfully refreshed from Google Patents.
US3284440A
Expired / Lapsed
US
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Phosphate esters of cytosine arabinoide and process for preparing same
Assignee: Merck and Co Inc
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Filing: 1964-06-12
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Granted: 1966-11-08
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Expires: 1984-06-12
Abstract
No abstract record available.
Inventors
- 👤 Arthur A Patchett
- 👤 Shen Tsung-Ying
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:10
CPC Classifications
C; C07; C07H; C07H19/00; C07H19/02; C07H19/04; C07H19/06; C07H19/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
COMPOUNDS HAVING THE STRUCTURE 1-(3,4-DI(R''-O-),5-(R-P(=O)(-OH)-O-CH2-)-2-TETRAHYDROIN WHICH R IS SELECTED FROM THE GROUP CONSISTING OF R"-O-, (2-(2-(O=),4-NH2-1,2-DIHYDRO-1-PYRIMIDINYL), FURYL),4-NH2-1,2-DIHYDRO-2-PYRIMIDINONE 3,4-DI(R''-O-)-TETRAHYDROFURYL)-CH2-O-, (HO-)2-P(=O)-CH2AND (CH3-)2-N-,(C2H5-)2-N-, PYRROLIDINO, PIPERIDINO, 4-(HO-CH2-CH2-)PIPERAZINO, 4-CH3-PIPERAZINO, MORPHOLINO AND R'' IS SELECTED FROM THE GROUP CONSISTING OF -H LOWER ALKANOYL RADICALS AND BENZOYL, AND R" IS SELECTED FROM THE GROUP CONSISTING OF -H, LOWER ALKYL RADICALS AND PHENYL-LOWER ALKYL RADICALS.
Claim 2
Dependent Claim
57 words
COMPOUNDS HAVING THE STRUCTURE 1-(3,4-DI(R''-O-),5-(R-P(=O)(-OH)-O-CH2-)-2-TETRAHYDROIN WHICH R IS SELECTED FROM THE GROUP CONSISTING OF R"-O-, (2-(2-(O=),4-NH2-1,2-DIHYDRO-1-PYRIMIDINYL), FURYL),4-NH2-1,2-DIHYDRO-2-PYRIMIDINONE 3,4-DI(R''-O-)-TETRAHYDROFURYL)-CH2-O-, (HO-)2-P(=O)-CH2AND (CH3-)2-N-,(C2H5-)2-N-, PYRROLIDINO, PIPERIDINO, 4-(HO-CH2-CH2-)PIPERAZINO, 4-CH3-PIPERAZINO, MORPHOLINO AND R'' IS SELECTED FROM THE GROUP CONSISTING OF -H LOWER ALKANOYL RADICALS AND BENZOYL, AND R" IS SELECTED FROM THE GROUP CONSISTING OF -H, LOWER ALKYL RADICALS AND PHENYL-LOWER ALKYL RADICALS.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |