Patent US2537845A successfully refreshed from Google Patents.
US2537845A
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Process for producing alkenyl esters of endoalkylene-tetrahydrophthalic acids
Assignee: Shell Development Co
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Filing: 1944-09-30
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Granted: 1951-01-09
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Expires: 1964-09-30
Abstract
No abstract record available.
Inventors
- 👤 Rupert C Morris
- 👤 Alva V Snider
- 👤 Robert M Horowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:12
CPC Classifications
C; C08; C08F; C08F18/00; C08F18/02; C08F18/04; C08F18/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A METHOD FOR THE PRODUCTION OF DIALLY-3,6ENDOETHYLENE-1,2,36-TETRAHYDROPHTHALATE WHICH COMPRISING HEATING A MIXTURE COMPRISING DIALLYL MALEATE AND CYCLOHEXADINE AT A REACTION TEMPERATURE OF FROM ABOUT 75* C. TO ABOUT 125* C. TO CAUSE SAID MATERIALS TO REACT BY ADDITION TO FROM SAID DIALLYL-3,6-ENDOETHYLENE-1,2,3,6-TETRAHYDROPHTHALATE.
Claim 2
Independent Claim
42 words
A METHOD FOR THE PRODUCTION OF DIALLY-3,6ENDOETHYLENE-1,2,36-TETRAHYDROPHTHALATE WHICH COMPRISING HEATING A MIXTURE COMPRISING DIALLYL MALEATE AND CYCLOHEXADINE AT A REACTION TEMPERATURE OF FROM ABOUT 75* C. TO ABOUT 125* C. TO CAUSE SAID MATERIALS TO REACT BY ADDITION TO FROM SAID DIALLYL-3,6-ENDOETHYLENE-1,2,3,6-TETRAHYDROPHTHALATE.
References Cited (Backward Citations)
US1944731A
Cited
US2221663A
Cited
US2359038A
Cited
US2275034A
Cited
US2311261A
Cited
US2409633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |