US2623046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of acridan-10-carboxylic acid and methods for producing the same
Assignee: GD Searle LLC
•
Filing: 1951-02-07
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Granted: 1952-12-23
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Expires: 1971-02-07
Abstract
No abstract record available.
Inventors
- 👤 John W Cusic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:48
CPC Classifications
C; C07; C07D; C07D219/00; C07D219/02; C07D219/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
ESTERS OF ACRIDAN-10-CARBOXYLIC ACID OF THE CLASS CONSISTING OF LOWER ALKYL, LOWER HALOALKYL AND LOWER BASICALLY SUBSTITUTED ALKYL ESTERS.
Claim 2
Dependent Claim
19 words
ESTERS OF ACRIDAN-10-CARBOXYLIC ACID OF THE CLASS CONSISTING OF LOWER ALKYL, LOWER HALOALKYL AND LOWER BASICALLY SUBSTITUTED ALKYL ESTERS.
References Cited (Backward Citations)
US2170037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |