US3531448A
Expired / Lapsed
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Process for removal of hydrogenation catalyst from hyrogenated polymers
Assignee: Phillips Petroleum Co
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Filing: 1968-11-06
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Granted: 1970-09-29
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Expires: 1988-11-06
Abstract
No abstract record available.
Inventors
- 👤 Marvin M Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:38
CPC Classifications
C; C09; C09J; C09J5/00; C09J5/06; B; B01; B01J; B01J27/00; B01J27/28; B01J27/285; B01J31/00; B01J31/02; B01J31/04; B01J31/12; B01J31/14; B01J31/143; B01J31/40; B01J31/4015; B01J31/4023; B01J31/403; C08; C08C; C08C19/00; C08C19/02; C08C2/00; C08C2/02; C08C2/04; C08F; C08F6/00; C08F6/02; B01J2231/00; B01J2231/60; B01J2231/64; B01J2231/641; B01J2231/645; B01J2531/00; B01J2531/80; B01J2531/84; B01J2531/847; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 0
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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) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |