US2825721A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers and production thereof
Assignee: Phillips Petroleum Co
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Filing: 1956-03-26
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Granted: 1958-03-04
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Expires: 1976-03-26
Abstract
No abstract record available.
Inventors
- 👤 Hogan John Paul
- 👤 Robert L Banks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:16
CPC Classifications
C; C08; C08F; C08F10/00; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; C08F110/00; C08F110/02; C10; C10M; C10M2203/00; C10M2203/10; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584; Y10; Y10S; Y10S260/00; Y10S260/25; Y10S273/00; Y10S273/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS WHICH COMPRISING POLYMERIZING AT LEAST ONE POLYMERIZABLE OLEFIN, AT A POLYMERIZATION TEMPERATURE UP TO ABOUT 500*F., WITH A CATALYST ACTIVE FOR SUCH POLYMERIZATION AND COMPRISING, AS THE SOLE ESSENTIAL EFFECTTIVE CATALYTIC INGREDIENTS THEREOF, CHROMIUM OXIDE AND AT LEAST ONE MATERIAL SELECTED FORM THE GROUP CONSISTING OF SILICA, ALUMINA, ZICRONIA, AND THORIA, AT LEAST PART OF THE CHROMIUM BEING IN THE HEXAVALENT STATE AT THE INITIAL CONTACTING OF HYDROCARBON WITH SAID CATALYST.
Claim 2
Dependent Claim
73 words
A PROCESS WHICH COMPRISING POLYMERIZING AT LEAST ONE POLYMERIZABLE OLEFIN, AT A POLYMERIZATION TEMPERATURE UP TO ABOUT 500*F., WITH A CATALYST ACTIVE FOR SUCH POLYMERIZATION AND COMPRISING, AS THE SOLE ESSENTIAL EFFECTTIVE CATALYTIC INGREDIENTS THEREOF, CHROMIUM OXIDE AND AT LEAST ONE MATERIAL SELECTED FORM THE GROUP CONSISTING OF SILICA, ALUMINA, ZICRONIA, AND THORIA, AT LEAST PART OF THE CHROMIUM BEING IN THE HEXAVALENT STATE AT THE INITIAL CONTACTING OF HYDROCARBON WITH SAID CATALYST.
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) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |