Patent US3024768A successfully refreshed from Google Patents.
US3024768A
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Two-hand pneumatic control and signalling system
Assignee: AT&T Inc
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Filing: 1960-05-09
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Granted: 1962-03-13
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Expires: 1980-05-09
Abstract
No abstract record available.
Inventors
- 👤 Ernest W Shalgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:57
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/08; F16; F16P; F16P3/00; F16P3/18; F16P3/22; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/3056; F15B2211/30565; F15B2211/32; F15B2211/321; F15B2211/324; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/87233; Y10T137/87241; Y10T137/87265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |