US3438952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the polymerization of olefin monomers
Assignee: Phillips Petroleum Co
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Filing: 1964-11-02
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Granted: 1969-04-15
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Expires: 1984-11-02
Abstract
No abstract record available.
Inventors
- 👤 Don C Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:06
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; B; B01; B01F; B01F35/00; B01F35/90; B01F35/93; B01J; B01J19/00; B01J19/0006; B01J19/18; B01J19/1868; B01J19/1875; B01J19/20; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00054; B01J2219/00056; B01J2219/00058; B01J2219/00074; B01J2219/00076; B01J2219/00085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3284430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |