US3849509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyalkenamers and process for the preparation thereof
Assignee: Huels AG
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Filing: 1973-06-11
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Granted: 1974-11-19
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Expires: 1993-06-11
Abstract
Abstract 1. A PROCESS FOR THE PRODUCTION OF POLYALKENAMERS BY THE CATALYZED RING-OPENING POLYMERIZATION OF CYCLIC OLEFINS EMPLOYING A CATALYST CONTAINING A METAL OF SUBGROUPS 5 TO 7 OF THE PERIODIC TABLE WHICH COMPRISES CONDUCTING THE POLYMERIZATION IN THE PRESENCE OF AN UNSATURATED CARBOXYLIC ACID ESTER WHEREIN THE ESTER GROUP IS SEPARATED FROM THE DOUBLE BONDED CARBON ATOM BY AT LEAST ONE METHYLENE GROUP OR THE SINGLE BONDED OXYGEN ATOM OF THE ESTER GROUP AND AT LEAST ONE OF THE CARBON ATOMS HAVING THE DOUBLE BOND HAS AT LEAST ONE HYDROGEN ATOM.
Inventors
- 👤 R Streck
- 👤 H Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:43
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/94
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR THE PRODUCTION OF POLYALKENAMERS BY THE CATALYZED RING-OPENING POLYMERIZATION OF CYCLIC OLEFINS EMPLOYING A CATALYST CONTAINING A METAL OF SUBGROUPS 5 TO 7 OF THE PERIODIC TABLE WHICH COMPRISES CONDUCTING THE POLYMERIZATION IN THE PRESENCE OF AN UNSATURATED CARBOXYLIC ACID ESTER WHEREIN THE ESTER GROUP IS SEPARATED FROM THE DOUBLE BONDED CARBON ATOM BY AT LEAST ONE METHYLENE GROUP OR THE SINGLE BONDED OXYGEN ATOM OF THE ESTER GROUP AND AT LEAST ONE OF THE CARBON ATOMS HAVING THE DOUBLE BOND HAS AT LEAST ONE HYDROGEN ATOM.
Claim 2
Dependent Claim
90 words
A PROCESS FOR THE PRODUCTION OF POLYALKENAMERS BY THE CATALYZED RING-OPENING POLYMERIZATION OF CYCLIC OLEFINS EMPLOYING A CATALYST CONTAINING A METAL OF SUBGROUPS 5 TO 7 OF THE PERIODIC TABLE WHICH COMPRISES CONDUCTING THE POLYMERIZATION IN THE PRESENCE OF AN UNSATURATED CARBOXYLIC ACID ESTER WHEREIN THE ESTER GROUP IS SEPARATED FROM THE DOUBLE BONDED CARBON ATOM BY AT LEAST ONE METHYLENE GROUP OR THE SINGLE BONDED OXYGEN ATOM OF THE ESTER GROUP AND AT LEAST ONE OF THE CARBON ATOMS HAVING THE DOUBLE BOND HAS AT LEAST ONE HYDROGEN ATOM.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |