Patent US2903404A successfully refreshed from Google Patents.
US2903404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalysis and catalytic systems
Assignee: Standard Oil Co
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Filing: 1956-10-04
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Granted: 1959-09-08
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Expires: 1976-10-04
Abstract
No abstract record available.
Inventors
- 👤 Oita Katashi
- 👤 Thomas D Nevitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:55
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR TH EPOLYMERIZATION OF A NORMALLY GASEOUS N-ALKENE TO PRODUCE A NORMALLY SOLID TERMOPLASTIC POLYMER, WHICH PROCESS COMPRISES CONTACTING SAID ALKENE WITH A CATALYTIC SYSTEM CONSITING ESSENTIALLY OF A COMPOUND OF A TRANSITION METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM AND HAFNIUM AND HAVING NO METAL TO HYDROCARBON RADICAL BOND AND AN IONIZING RADIATION DOSE IN THE RANGE OF ABOUT 104 TO 107 REP, AND RECOVERING A POLYMER THUS PRODUCED.
Claim 2
Dependent Claim
74 words
A PROCESS FOR TH EPOLYMERIZATION OF A NORMALLY GASEOUS N-ALKENE TO PRODUCE A NORMALLY SOLID TERMOPLASTIC POLYMER, WHICH PROCESS COMPRISES CONTACTING SAID ALKENE WITH A CATALYTIC SYSTEM CONSITING ESSENTIALLY OF A COMPOUND OF A TRANSITION METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM AND HAFNIUM AND HAVING NO METAL TO HYDROCARBON RADICAL BOND AND AN IONIZING RADIATION DOSE IN THE RANGE OF ABOUT 104 TO 107 REP, AND RECOVERING A POLYMER THUS PRODUCED.
References Cited (Backward Citations)
US2437531A
Cited
GB714843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |