US3585216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of benzoic acid lactones and novel intermediates therefor
Assignee: Roche Palo Alto LLC
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Filing: 1966-07-19
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Granted: 1971-06-15
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Expires: 1986-07-19
Abstract
Abstract 1. A COMPOUND SELECTED FROM THOSE OF THE FORMULA: 1-R1,2-((R4''-)(CH3-CH2-OOC-(CH2)2-CH(-R3)-O-CH2-),3- ((R4"-)(CH3-CH2-OOC-(CH2)3-CH=CH-),5-R2-BENZENE WHEREIN EACH OF R1 AND R2 IS HYDROGEN, HYDROXY, LOWER ALKOXY, HALO, CYCLOPENTYLOXY, TETRAHYDROFURAN-2-YLOXY, TETRAHYDROPYRAN-2-YLOXY, HYDROCARBON CARBOXYLIC ACYL OR ACYLOXY OF LESS THAN 12 CARBON ATOMS OR, WHEN TAKEN TOGETHER, 4,5-BENZO; R3 IS HYDROGEN OR (LOWER) ALKYL; AND EACH OF R4'' AND R4" IS HALO OR THE GROUP (CNH2N)-H IN WHICH N HAS A VLAUE OF FROM 0 TO 6, PROVIDED THAT AT LEAST ONE R4'' AND R4" IS HYDROGEN, AND THE CORRESPONDING DIACID DERIVATIVES THEREOF.
Inventors
- 👤 Alexander D Cross
- 👤 John H Fried
- 👤 Ian T Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:13
CPC Classifications
C; C07; C07D; C07D313/00; C07D309/00; C07D309/02; C07D309/08; C07D309/10; C07D309/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A COMPOUND SELECTED FROM THOSE OF THE FORMULA:
Claim 2
Dependent Claim
8 words
A COMPOUND SELECTED FROM THOSE OF 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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |