US2534235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
8-haloxanthine salts of dialkylaminoalkyl type antihistamine bases
Assignee: GD Searle LLC
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Filing: 1949-01-19
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Granted: 1950-12-19
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Expires: 1969-01-19
Abstract
No abstract record available.
Inventors
- 👤 John W Cusic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:47
CPC Classifications
C; C07; C07D; C07D473/00; C07D473/02; C07D473/04; C07D473/06; C07D473/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A SALT OF AN ORGANIC BASE AND AN 8-HALOXANTHINE WHICH CONTAINS A HYDROGEN ATOM IN POSITION 7, SAID ORGANIC BASE BEING A MEMBER OF THE GROUP OF ANTI-HISTAMINIC AGENTS CONSISTING OF 8-DI(LOWER ALKYL) AMINO-LOWER-ALKYL-ACRIDANS, 10DI(LOWER ALKYL) AMINO-LOWER-ALKYLTHIOXANTHENES, 9-DI(LOWER ALKYL) AMINO - LOWER-ALKYL-9,10-DIHYDROANTHRACENES AND 1,1-DI(MONOCYCLIC ARYL)-3DI(LOWER ALKYL)AMINO-LOWER-1-ALKANOLS.
Claim 2
Dependent Claim
46 words
A SALT OF AN ORGANIC BASE AND AN 8-HALOXANTHINE WHICH CONTAINS A HYDROGEN ATOM IN POSITION 7, SAID ORGANIC BASE BEING A MEMBER OF THE GROUP OF ANTI-HISTAMINIC AGENTS CONSISTING OF 8-DI(LOWER ALKYL) AMINO-LOWER-ALKYL-ACRIDANS, 10DI(LOWER ALKYL) AMINO-LOWER-ALKYLTHIOXANTHENES, 9-DI(LOWER ALKYL) AMINO - LOWER-ALKYL-9,10-DIHYDROANTHRACENES AND 1,1-DI(MONOCYCLIC ARYL)-3DI(LOWER ALKYL)AMINO-LOWER-1-ALKANOLS.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |