Patent US3008944A successfully refreshed from Google Patents.
US3008944A
Expired / Lapsed
US
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Production of solid polymers of diolefins
Assignee: Phillips Petroleum Co
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Filing: 1957-08-16
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Granted: 1961-11-14
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Expires: 1977-08-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Lawrence V Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:50
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN A PROCESS FOR POLYMERIZING CONJUGATED DIOLEFINS, CONTAINING A MAXIMUM OF 8 CARBON ATOMS PER MOLECULE AND HAVING AT LEAST ONE TERMINAL DOUBLE BOND, WHICH COMPRISES CONTACTING AT LEAST ONE OF SAID CONJUGATED DIOLEFINS WITH A CHROMIUM OXIDE CONTAINING CATALYST AND THEREBY PRODUCING A SOLID POLYMER-CATALYST MIXTURE, THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID MIXTURE WITH A NON-OXIDIZING MATERIAL SELECTED FROM THE GROUP CONSISTING OF WATER, CARBON MONOXIDE, KETONES, ALCOHOLS, ETHERS AND AMINES, SAID CONTACTING OCCURRING PRIOR TO EXPOSURE OF SAID MIXTURE TO THE ATMOSPHERE.
Claim 2
Dependent Claim
84 words
IN A PROCESS FOR POLYMERIZING CONJUGATED DIOLEFINS, CONTAINING A MAXIMUM OF 8 CARBON ATOMS PER MOLECULE AND HAVING AT LEAST ONE TERMINAL DOUBLE BOND, WHICH COMPRISES CONTACTING AT LEAST ONE OF SAID CONJUGATED DIOLEFINS WITH A CHROMIUM OXIDE CONTAINING CATALYST AND THEREBY PRODUCING A SOLID POLYMER-CATALYST MIXTURE, THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID MIXTURE WITH A NON-OXIDIZING MATERIAL SELECTED FROM THE GROUP CONSISTING OF WATER, CARBON MONOXIDE, KETONES, ALCOHOLS, ETHERS AND AMINES, SAID CONTACTING OCCURRING PRIOR TO EXPOSURE OF SAID MIXTURE TO THE ATMOSPHERE.
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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) | 1964-11-13 | 1965-05-15 | 1965-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-13 | 1969-05-15 | 1969-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-13 | 1973-05-15 | 1973-11-14 | $7700.00 | Window Closed / Lapsed |