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US3660508A Expired / Lapsed US ⏱️ 0.0 years remaining

Polycyclic compounds and copolymers derived therefrom

Assignee: Imperial Chemical Industries Ltd
•
Filing: 1970-08-21
•
Granted: 1972-05-02
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Expires: 1990-08-21
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Abstract

Abstract A POLYCYCLIC DIENE HAVING THE STRUCTURE (CYCLOPENT-4-EN-1,3-YLENE)(CYCLOPENTANE-1,2,3,5-TETRAYL)N- (5-R-CYCLOHEX-5-EN-1,2-YLENE) MIXTURES THEREOF WITH A POLYCYCLIC DIENE HAVING THE STRUCTURE (CYCLOPENT-4-EN-1,3-YLENE)-(CYCLOPENTANE-1,2,3,5- TETRAYL)N-(5-R-CYCLOHEX-4-EN-1,2-YLENE) WHERE R IS A HYDROCARBYL GROUP AND N IS ZERO OR AN INTEGER, DERIVATIVES OF SAID DIENES IN WHICH ONE OR MORE OF THE CYCLIC CARBON ATOMS OTHER THAN THOSE FORMING PART OF A CARBON-CARBON DOUBLE BOND IN AN ENDOMETHYLENE BRIDGED RING AND THOSE INDICATED AS CARRYING HYDROGEN ATOMS CARRIES A FURTHER HYDROCARBYL SUBSTITUENT GROUP, A PROCESS FOR THEIR PREPARATION AND VULCANISABLE OLEFIN COPOLYMERS DERIVED THEREFROM.

Inventors

  • 👤 Edward Charles Dart
  • 👤 Richard Gregory Foster
  • 👤 Paul Hepworth

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 19:30
CPC Classifications
C; C07; C07C; C07C13/00; C07C13/28; C07C13/32; C07C13/62; C07C13/64; C07C1/00; C07C1/26; C07C1/30; C07C13/54; C07C13/605; C07C5/00; C07C5/22; C07C5/23; C07C5/25; C07C5/2506; C07C5/2512; C07C5/2525; C07C5/2531; C07C5/2543; C07C5/255; C08; C08F; C08F210/00; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/30; C07C2603/56; C07C2603/58; C07C2603/60; C07C2603/66

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-05-02 1975-11-01 1976-05-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-05-02 1979-11-01 1980-05-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-05-02 1983-11-01 1984-05-02 $7700.00 Window Closed / Lapsed

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