US3251893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cycloolefin trimers
Assignee: Millennium Petrochemicals Inc
•
Filing: 1962-12-31
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Granted: 1966-05-17
•
Expires: 1982-12-31
Abstract
No abstract record available.
Inventors
- 👤 Feldman Julian
- 👤 Bernard A Saffer
- 👤 Thomas Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:59
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/42; C07C2/44; C07C2/46; C07C2/465; C07C2531/00; C07C2531/16; C07C2531/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR THE PRODUCTION OF A SUSBTANTIAL AMOUNT OF CYCLOOLEFIN TRIMERS WHICH COMPRISES POLYMERIZING A CONJUGATED DIOLEFIN HAVING FROM ABOUT 4 TO 8 CARBON ATOMS PER MOLECULE AT AN ELEVATED TEMPERATURE BY CONTACTING SAID DIOLEFIN WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OF NICKEL DICINNAMONITRILE, MONO-TRIMETHYLPHOSPHITE NICKEL DIACRYLONITRILE, BIS(TRIPHENYLSTIBINE) NICKEL DIACROLEIN, AND BIS(TRIPHENYLSTIBINE) NICKEL DICINNAMONITRILE.
Claim 2
Dependent Claim
57 words
A PROCESS FOR THE PRODUCTION OF A SUSBTANTIAL AMOUNT OF CYCLOOLEFIN TRIMERS WHICH COMPRISES POLYMERIZING A CONJUGATED DIOLEFIN HAVING FROM ABOUT 4 TO 8 CARBON ATOMS PER MOLECULE AT AN ELEVATED TEMPERATURE BY CONTACTING SAID DIOLEFIN WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OF NICKEL DICINNAMONITRILE, MONO-TRIMETHYLPHOSPHITE NICKEL DIACRYLONITRILE, BIS(TRIPHENYLSTIBINE) NICKEL DIACROLEIN, AND BIS(TRIPHENYLSTIBINE) NICKEL DICINNAMONITRILE.
References Cited (Backward Citations)
US2504016A
Cited
US2686208A
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US2686209A
Cited
US2991317A
Cited
FR1295072A
Cited
FR1300595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |