US3359285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of cyclic addition products
Assignee: Mobil Oil AS
•
Filing: 1963-07-03
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Granted: 1967-12-19
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Expires: 1983-07-03
Abstract
No abstract record available.
Inventors
- 👤 Phillip S Landis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:44
CPC Classifications
C; C07; C07B; C07B37/00; C07B37/10; C07B37/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A PROCESS FOR PRODUCING CYCLIC ADDITION PRODUCTS WHICH COMPRISES REACTING ISOPRENE AND MALEIC ANHYDRIDE AT A TEMPERATURE FROM ABOUT 0*C. TO ABOUT 400*C. IN THE PRESENCE OF ACID MORDENITE AND RECOVERING A PRODUCT OF 4-METHYL-$4-TETRAHYDROPHTHALIC ANHYDRIDE.
Claim 2
Dependent Claim
92 words
A PROCESS FOR PRODUCING CYCLIC ADDITIONAL PRODUCTS WHICH COMPRISES REACTING A CONJUGATED ALIPHATIC IDENE CONTAINING FROM 4 TO 20 CARBON ATOMS AND AN A,B-ETHYLENICALLY UNSATURATED CARBONYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACIDS, ANHYDRIDES, KETONES AND ALDEHYDES CONTAINING FROM 3 TO 15 CARBON ATOMS AT A TEMPERATURE FROM ABOUT 0*C. TO ABOUT 600*C. IN THE PRESENCE OF ACATALYST COMPRISING A CRYSTALLINE ALUMINO-SILICATE HAVING ACTIVE CATION SITES WITHN AN ORDERED INTERNAL STRUCTURE, SAID ORDERED INTERNAL STRUCTURE HAVING A DEFINED PORESIZE OF AT LEAST 6A., AND RECOVERING THE REACTION PRODUCTS FROM SAID CATALYST.
References Cited (Backward Citations)
US1944731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |