Patent US2678931A successfully refreshed from Google Patents.
US2678931A
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Disubstituted octahydronaphthalene-1, 2-dicarboxylic acid
Assignee: Pharmacia and Upjohn Co
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Filing: 1951-03-30
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Granted: 1954-05-18
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Expires: 1971-03-30
Abstract
No abstract record available.
Inventors
- 👤 John A Hogg
- 👤 Jr Frank H Lincoln
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:09
CPC Classifications
C; C07; C07C; C07C61/00; C07C61/16; C07C61/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
11 words
A 6-LOWER ALKOXY-8A-METHYL-1,2,3,5,6,7,8,8AOCTAHYDRONAPHTHALENE - 1,2 - DICARBOXYLIC ACID HAVING THE FORMULA:
Claim 2
Dependent Claim
11 words
A 6-LOWER ALKOXY-8A-METHYL-1,2,3,5,6,7,8,8AOCTAHYDRONAPHTHALENE - 1,2 - DICARBOXYLIC ACID HAVING THE FORMULA:
Claim 3
Dependent Claim
30 words
THE PROCESS WHICH COMPRISES: CONDENSING MALEIC ANHYDRIDE WITH 1-METHYL-2-VINYL-4-LOWER ALKOXYCYCLOHEXENE IN AN INERT ORGANIC DILUENT CONTAINING A POLYMERIZATION INHIBITOR AT A TEMPERATURE BETWEEN APPROXIMATELY EIGHTY AND APPROXIMATELY 120 DEGREES CENTIGRADE.
Claim 4
Dependent Claim
30 words
THE PROCESS WHICH COMPRISES: CONDENSING MALEIC ANHYDRIDE WITH 1-METHYL-2-VINYL-4-LOWER ALKOXYCYCLOHEXENE IN AN INERT ORGANIC DILUENT CONTAINING A POLYMERIZATION INHIBITOR AT A TEMPERATURE BETWEEN APPROXIMATELY EIGHTY AND APPROXIMATELY 120 DEGREES CENTIGRADE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |