US2959599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization of cyclohexene-1, 2-dicarboxylic anhydrides
Assignee: Honeywell International Inc
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Filing: 1956-11-19
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Granted: 1960-11-08
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Expires: 1976-11-19
Abstract
No abstract record available.
Inventors
- 👤 Maurice E Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:00
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/54; C07C51/567
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF INDUCING A NUCLEAR DOUBLE BOND SHIFT IN A TETRAHYDROPHTHALIC ANHYDRIDE COMPOUND SELECTED FROM THE GROUP CONSISTING OF 4-CYCLOHEXENE-1,2-DICARBOXYLIC ANHYDRIDE AND THE LOWER ALKYL SUBSTITUTION DERIVATIVES THEREOF, WHICH COMPRISES HEATING THE ANHYDRIDE WITH 0.1% TO 10% BY WEIGHT OF A COMPOUND OF THE GROUP CONSISTING OF PHOSPHORIC ACID, SULFURIC ACID, THE ANHYDRIDES OF SULFURIC ACID AND OF PHOSPHORIC ACID, CHLOROSULFONIC ACID, PHOSPHORUS OXYCHLORIDE, PHOSPHORUS PENTACHLORIDE AND SODIUM BISULFATE AT A TEMPERATURE BETWEEN 70*C. AND 230*C.
Claim 2
Independent Claim
77 words
THE METHOD OF INDUCING A NUCLEAR DOUBLE BOND SHIFT IN A TETRAHYDROPHTHALIC ANHYDRIDE COMPOUND SELECTED FROM THE GROUP CONSISTING OF 4-CYCLOHEXENE-1,2-DICARBOXYLIC ANHYDRIDE AND THE LOWER ALKYL SUBSTITUTION DERIVATIVES THEREOF, WHICH COMPRISES HEATING THE ANHYDRIDE WITH 0.1% TO 10% BY WEIGHT OF A COMPOUND OF THE GROUP CONSISTING OF PHOSPHORIC ACID, SULFURIC ACID, THE ANHYDRIDES OF SULFURIC ACID AND OF PHOSPHORIC ACID, CHLOROSULFONIC ACID, PHOSPHORUS OXYCHLORIDE, PHOSPHORUS PENTACHLORIDE AND SODIUM BISULFATE AT A TEMPERATURE BETWEEN 70*C. AND 230*C.
References Cited (Backward Citations)
US2764597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |