US2813135A
Expired / Lapsed
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Multi-stage cyclodiene dimerizing process
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1955-02-08
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Granted: 1957-11-12
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Expires: 1975-02-08
Abstract
No abstract record available.
Inventors
- 👤 John F Johnson
- 👤 Harold W Scheeline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:16
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/50; C07C2603/00; C07C2603/56; C07C2603/58; C07C2603/60; C07C2603/66; C07C2603/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
IN A PROCESS OF DIMERIZING A CONCENTRATED CYCLOPENTA DIENE MONOMER FEED WHEREIN THE MONOMER CONTAINING FREED IS MAINTAINED AT ELEVATED TEMPERATURES FOR A PERIOD OF TIME, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID DIMERIZATION IN AT LEAST TWO STAGES, CONTROLLING THE HEAT AND TIME OF DIMERIZATION IN THE FIRST STAGE TO LIMIT THE AMOUNT OF DIMER FORMATION TO NOT MORE THAN ABOUT 90% THE TIME OF DIMERIZATION IN SAID FIRST STAGE BEING ABOVE
Claim 2
Dependent Claim
72 words
IN A PROCESS OF DIMERIZING A CONCENTRATED CYCLOPENTA DIENE MONOMER FEED WHEREIN THE MONOMER CONTAINING FREED IS MAINTAINED AT ELEVATED TEMPERATURES FOR A PERIOD OF TIME, THE IMPROVEMENT WHICH COMPRISES CONDUCTING SAID DIMERIZATION IN AT LEAST TWO STAGES, CONTROLLING THE HEAT AND TIME OF DIMERIZATION IN THE FIRST STAGE TO LIMIT THE AMOUNT OF DIMER FORMATION TO NOT MORE THAN ABOUT 90% THE TIME OF DIMERIZATION IN SAID FIRST STAGE BEING ABOVE
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) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |