US3005533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid keyboard using jet-pipe valves
Assignee: Unisys Corp
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Filing: 1960-10-31
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Granted: 1961-10-24
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Expires: 1980-10-31
Abstract
No abstract record available.
Inventors
- 👤 Walter G Wadey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:17
CPC Classifications
B; B41; B41J; B41J23/00; B41J23/20; B41J23/22; F; F15; F15B; F15B21/00; F15C; F15C1/00; F15C1/001; F15C1/02; F15C1/04; F15C3/00; F15C3/10; F15C3/12; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/218; Y10T137/2202; Y10T137/2278; Y10T137/2322
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-23 | 1965-04-24 | 1965-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-23 | 1969-04-24 | 1969-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-23 | 1973-04-24 | 1973-10-24 | $7700.00 | Window Closed / Lapsed |