US2534813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
8-haloxanthine salts of cyclic-aminoalkyl benzohydryl ethers and the production thereof
Assignee: GD Searle LLC
•
Filing: 1950-01-21
•
Granted: 1950-12-19
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Expires: 1970-01-21
Abstract
No abstract record available.
Inventors
- 👤 John W Cusic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:58
CPC Classifications
C; C07; C07D; C07D473/00; C07D473/02; C07D473/04; C07D473/06; C07D473/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
9 words
A SALT OF A BASIC EITHER OF THE FORMULA
Claim 2
Dependent Claim
9 words
A SALT OF A BASIC EITHER OF THE FORMULA
Claim 3
Dependent Claim
26 words
THE PROCESS OF PRODUCING A SALT OF A BASIC ETHER AND AN 8-HALOXANTHINE CONTAINING A HYDROGEN ATOM IN THE 7-POSITION, SAID BASIC ETHER HAVIN THE FORMULA.
Claim 4
Dependent Claim
26 words
THE PROCESS OF PRODUCING A SALT OF A BASIC ETHER AND AN 8-HALOXANTHINE CONTAINING A HYDROGEN ATOM IN THE 7-POSITION, SAID BASIC ETHER HAVIN THE FORMULA.
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) | 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 |