US2998026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential pressure air valve
Assignee: LOGANSPORT MACHINE Co
•
Filing: 1957-11-27
•
Granted: 1961-08-29
•
Expires: 1977-11-27
Abstract
No abstract record available.
Inventors
- 👤 Robert E Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:26
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0431; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0396; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86614; Y10T137/87169; Y10T137/87193; Y10T137/87209
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US569366A
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US2396787A
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US2409517A
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FR1050510A
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US2739613A
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US2778378A
Cited
US2823689A
Cited
US2836154A
Cited
US2836196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |