US2554259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidized polypropylene and its use as plasticizer
Assignee: Standard Oil Development Co
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Filing: 1948-07-29
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Granted: 1951-05-22
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Expires: 1968-07-29
Abstract
No abstract record available.
Inventors
- 👤 Louis A Mikeska
- 👤 David W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:45
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08F; C08F8/00; C08F8/06; C08K; C08K5/00; C08K5/0008; C08K5/0016; C10M2209/00; C10M2209/02; C10M2209/10; C10M2209/102; C10M2213/00; C10M2213/04; C10M2213/06; C10M2219/00; C10M2219/02; C10M2219/024; C10M2223/00; C10M2223/12; C10M2225/00; C10M2225/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A PROCESS COMPRISING ADDING 0.3 TO 5% OF A HYDROCARBON SOLUBLE PEROXIDE TO A POLYPROPYLENE OIL HAVING A MOLECULAR WEIGHT BETWEEN 300 AND 5,000, BUBBLING AN OXYGEN-CONTAINING GAS THERE185* C., UNTIL THE COMBINED OXYGEN CONTENT OF THE POLYPROPYLENE OIL REACHES 5 TO 25% AND RECOVERING THE OXIDIZED POLYPROPYLENE.
Claim 2
Dependent Claim
48 words
A PROCESS COMPRISING ADDING 0.3 TO 5% OF A HYDROCARBON SOLUBLE PEROXIDE TO A POLYPROPYLENE OIL HAVING A MOLECULAR WEIGHT BETWEEN 300 AND 5,000, BUBBLING AN OXYGEN-CONTAINING GAS THERE185* C., UNTIL THE COMBINED OXYGEN CONTENT OF THE POLYPROPYLENE OIL REACHES 5 TO 25% AND RECOVERING THE OXIDIZED POLYPROPYLENE.
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) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |