Patent US2772259A successfully refreshed from Google Patents.
US2772259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali hydroperoxides as olefin polymerization catalysts
Assignee: Eastman Kodak Co
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Filing: 1953-08-13
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Granted: 1956-11-27
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Expires: 1973-08-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Hugh J Hagemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:45
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A PROCESS WHICH COMPRISES HEATING ETHYLENE IN THE PRESENCE OF A CATALYST SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
21 words
A PROCESS WHICH COMPRISES HEATING ETHYLENE IN THE PRESENCE OF A CATALYST SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |