US2656398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of unsaturated compounds with palladium oxide containing catalyst
Assignee: Phillips Petroleum Co
•
Filing: 1949-11-10
•
Granted: 1953-10-20
•
Expires: 1969-11-10
Abstract
No abstract record available.
Inventors
- 👤 Vault Albert N De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:35
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/10; B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/44; B01J37/00; B01J37/02; B01J37/03; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/06; C07C2521/08; C07C2521/10; C07C2523/00; C07C2523/12; C07C2523/38; C07C2523/40; C07C2523/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A PROCESS FOR THE POLYMERIZATION OF ETHYLENE WHICH COMPRISES CONTACTING ETHYLENE AT TEMPERATURE IN THE RANGE 0 TO 250* C. WITH A CATALYST CONSISTING ESSENTIALLY OF PALLADIUM OXIDE ON A POROUS SILICEOUS BASE.
Claim 2
Dependent Claim
33 words
A PROCESS FOR THE POLYMERIZATION OF ETHYLENE WHICH COMPRISES CONTACTING ETHYLENE AT TEMPERATURE IN THE RANGE 0 TO 250* C. WITH A CATALYST CONSISTING ESSENTIALLY OF PALLADIUM OXIDE ON A POROUS SILICEOUS BASE.
References Cited (Backward Citations)
US1988112A
Cited
GB436906A
Cited
US2207868A
Cited
US2331915A
Cited
US2552692A
Cited
US2589189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |