US2986645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion control
Assignee: Combustion Engineering Inc
•
Filing: 1956-12-06
•
Granted: 1961-05-30
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Expires: 1976-12-06
Abstract
No abstract record available.
Inventors
- 👤 Harold S Smith
- 👤 Robert R Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:44
CPC Classifications
F; F23; F23N; F23N1/00; F23N1/08; F23N1/10; F23N1/107; F22; F22B; F22B35/00; F22B35/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2433725A
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US2743710A
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US2774019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |