Patent US3173902A successfully refreshed from Google Patents.
US3173902A
Expired / Lapsed
US
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Transition metal catalyst system
Assignee: Union Carbide Corp
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Filing: 1959-12-31
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Granted: 1965-03-16
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Expires: 1979-12-31
Abstract
No abstract record available.
Inventors
- 👤 Wayne L Carrick
- 👤 Frederick J Karol
- 👤 George L Karapinka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:58
CPC Classifications
C; C08; C08F; C08F10/00; C08F4/00; C08F4/06; C08F4/16; C08F4/18; C08F4/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A CATALYST FOR POLYMRIZING LOWER OLEFINS CONSISTING ESSENTIALLY OF A LOWER ALKYL TITANIUM TRIHALIDE WITH A HALIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF VANADIUM AND CHROMIUM.
Claim 2
Dependent Claim
29 words
A CATALYST FOR POLYMRIZING LOWER OLEFINS CONSISTING ESSENTIALLY OF A LOWER ALKYL TITANIUM TRIHALIDE WITH A HALIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF VANADIUM AND CHROMIUM.
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) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |