US3003331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic back pressure control
Assignee: RTX Corp
•
Filing: 1958-12-05
•
Granted: 1961-10-10
•
Expires: 1978-12-05
Abstract
No abstract record available.
Inventors
- 👤 Richard J Coburn
- 👤 Kermit I Harner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:29
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/08; H02H7/085; H02H7/0856; H02H7/0857; F; F25; F25B; F25B41/00; F25B41/20; F25B41/24; F25B49/00; F25B49/02; G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/27535; G05D23/27537; Y; Y10; Y10S; Y10S62/00; Y10S62/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1238051A
Cited
US1422853A
Cited
US2282880A
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US2316066A
Cited
US2581956A
Cited
US2817213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-09 | 1965-04-10 | 1965-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-09 | 1969-04-10 | 1969-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-09 | 1973-04-10 | 1973-10-10 | $7700.00 | Window Closed / Lapsed |