US3475392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process control system for maintaining constant polymerization conditions
Assignee: Phillips Petroleum Co
•
Filing: 1963-09-23
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Granted: 1969-10-28
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Expires: 1983-09-23
Abstract
No abstract record available.
Inventors
- 👤 Raymond D Mccoy
- 👤 Frank T Ogle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:25
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/1862; B01J19/0006; C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00054; B01J2219/00056; B01J2219/00058; B01J2219/0006; B01J2219/00065; B01J2219/00069; B01J2219/00074; B01J2219/00076; B01J2219/00083; B01J2219/00164; B01J2219/00171; B01J2219/00182; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/0335; Y10T137/2496; Y10T137/2499; Y10T137/2504; Y10T137/2506; Y10T137/2509
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2872438A
Cited
US3174953A
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US3220998A
Cited
US3276843A
Cited
US3290116A
Cited
US3356667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |