US2969925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple variable area orifice injector
Assignee: Delavan Manufacturing Co
•
Filing: 1958-02-03
•
Granted: 1961-01-31
•
Expires: 1978-02-03
Abstract
No abstract record available.
Inventors
- 👤 Paul D Burgess
- 👤 Henry F Rothwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:00
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/22; F02C7/232; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/8593
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US308479A
Cited
US1645722A
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US1935874A
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US2345140A
Cited
US2645243A
Cited
US2806354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |