Patent US2237328A successfully refreshed from Google Patents.
US2981058A
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Multiple pressure sensing, indicating and control apparatus
Assignee: Solar Aircraft Co
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Filing: 1955-09-16
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Granted: 1961-04-25
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Expires: 1975-09-16
Abstract
No abstract record available.
Inventors
- 👤 Wendell E Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:55
CPC Classifications
F; F15; F15B; F15B5/00; F02; F02K; F02K1/00; F02K1/06; F02K1/15; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2365; Y10T137/2409
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |