US2878643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion stabilization control system responsive to oxidant concentration
Assignee: Phillips Petroleum Co
•
Filing: 1955-05-09
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Granted: 1959-03-24
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Expires: 1975-05-09
Abstract
No abstract record available.
Inventors
- 👤 Homer M Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:44
CPC Classifications
F; F02; F02C; F02C3/00; F02C3/20; F02C3/30; F02K; F02K1/00; F02K1/06; F02K1/15; F02K1/16; F02K1/17; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2700275A
Cited
US2689452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |