US3776944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetraloneoxy acetic acids and esters thereof
Assignee: Warner Lambert Co LLC
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Filing: 1971-09-16
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Granted: 1973-12-04
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Expires: 1991-09-16
Abstract
Abstract TETRALOEOXY ACETIC ACIDS FAVING THE FOLLOWING STRUCTURAL FORMULAS ARE DESCRIBED: 1-(O=),5-(HOOC-CH(-R1)-O-),8-R-1,2,3,4-TETRAHYDRONAPHTHA- LENE, 1-(O=),7-(HOOC-CH2-O-)-1,2,3,4-TETRAHYDRONAPHTHA- LENE, AND 1-(O=),6-(HOOC-CH2-O-)-1,2,3,4-TETRAHYDRO- NAPHTHALENE WHEREIN R IS HYDROGEN OR LOWER ALKOXY AND R1 IS HYDROGEN, LOWER ALKYL OR ARYL. THESE COMPOUNDS ARE PREPARED BY THE FOLLOWING REACTION SCHEME: 1-(O=),8-R,HO-1,2,3,4-TETRAHYDRONAPHTHALENE -> 1-(O=), 8-R,(R''"-OOC-CH(-R'')-O-)-1,2,3,4-TETRAHYDRONAPHTHALENE -> 1-(O=),8-R,(HOOC-CH(-R'')-O-)-1,2,3,4-TETRAHYDRONAPHTHALENE THEY ARE USEFUL AS ANTI-FLAMMATORY AGENTS.
Inventors
- 👤 R Brown
- 👤 P Cavanagh
- 👤 J Shavel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:30
CPC Classifications
C; C07; C07C; C07C405/00; C07C59/00; C07C59/40; C07C59/76; C07C59/90; C07C67/00; C07C67/30; C07C67/31; C07C69/00; C07C69/66; C07C69/67; C07C69/716; C07C69/73; C07C69/738
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |