US2698512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of operating ram-jet engines
Assignee: Phillips Petroleum Co
•
Filing: 1949-04-04
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Granted: 1955-01-04
•
Expires: 1969-04-04
Abstract
No abstract record available.
Inventors
- 👤 Robert M Schirmer
- 👤 Sylvester C Britton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:50
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/04; F; F02; F02K; F02K7/00; F02K7/10; C10L1/18; C10L1/1811; C10L1/22; C10L1/23; C10L1/231; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE554906C
Cited
US1888749A
Cited
GB439805A
Cited
US2274629A
Cited
US2479470A
Cited
US2455205A
Cited
US2534309A
Cited
US2563305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |