US3470069A
Expired / Lapsed
US
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Temperature control of a processing zone by sensing and averaging separate temperatures
Assignee: Phillips Petroleum Co
•
Filing: 1968-04-22
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Granted: 1969-09-30
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Expires: 1988-04-22
Abstract
No abstract record available.
Inventors
- 👤 Robert C Bracken
- 👤 Eugene D Lea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:07
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0006; B01J19/0013; G; G05; G05D; G05D23/00; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/00191; Y; Y10; Y10S; Y10S203/00; Y10S203/19; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2572253A
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US2684326A
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US3269921A
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US3249519A
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US3097836A
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US3223749A
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US3296121A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |