US2997456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of polymers of 1-olefins
Assignee: Phillips Petroleum Co
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Filing: 1959-05-11
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Granted: 1961-08-22
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Expires: 1979-05-11
Abstract
No abstract record available.
Inventors
- 👤 Kenneth R Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
THE METHOD OF STABILIZING A POLYMER OF A 1-OLEFIN HAVING FROM 3 TO 6 CARBON ATOMS PER MOLECULE WHICH COMPRISES MIXING WITH SAID POLYMER A STABILIZING AMOUNT OF A COMPOUND HAVING THE FORMULA
Claim 2
Independent Claim
33 words
THE METHOD OF STABILIZING A POLYMER OF A 1-OLEFIN HAVING FROM 3 TO 6 CARBON ATOMS PER MOLECULE WHICH COMPRISES MIXING WITH SAID POLYMER A STABILIZING AMOUNT OF A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US2727879A
Cited
FR1144496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |