Patent US3240762A successfully refreshed from Google Patents.
US3240762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Maleic anhydride hydrogenated polycyclopentadiene reaction products
Assignee: Velsicol Chemical LLC
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Filing: 1965-04-09
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Granted: 1966-03-15
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Expires: 1985-04-09
Abstract
No abstract record available.
Inventors
- 👤 Louis P Wilks
- 👤 Israel J Dissen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:18
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/46; C08F277/00; C08F8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PROCESS WHICH COMPRISES REACTING (1) BENZENESOLUBLE CATALYTIC CYCLOPENTADIENE HOMOPOLYMER CHARACTERIZED BY HAVING 1,4 LINKAGES AND HAVING BEEN HYDROGENATED IN THE PRESENCE OF A CATALYTIC AMOUNT OF PALLADIUM UNTIL A MINIMUM OF 60% AND UP TO 95% OF ITS UNSATURATION HAS BEEN HYDROGENTATED, WITH (2) MALEIC ANHYDRIDE AT A TEMPERATURE BETWEEN ABOUT 150*F. AND 500*F.
Claim 2
Dependent Claim
55 words
A PROCESS WHICH COMPRISES REACTING (1) BENZENESOLUBLE CATALYTIC CYCLOPENTADIENE HOMOPOLYMER CHARACTERIZED BY HAVING 1,4 LINKAGES AND HAVING BEEN HYDROGENATED IN THE PRESENCE OF A CATALYTIC AMOUNT OF PALLADIUM UNTIL A MINIMUM OF 60% AND UP TO 95% OF ITS UNSATURATION HAS BEEN HYDROGENTATED, WITH (2) MALEIC ANHYDRIDE AT A TEMPERATURE BETWEEN ABOUT 150*F. AND 500*F.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |