Patent US3548857A successfully refreshed from Google Patents.
US3548857A
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US
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Electrically responsive fluid logic system and method of assembly
Assignee: AT&T Inc
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Filing: 1967-08-10
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Granted: 1970-12-22
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Expires: 1987-08-10
Abstract
No abstract record available.
Inventors
- 👤 Lewis G Anderson
- 👤 David J Thomson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:43
CPC Classifications
F; F15; F15C; F15C3/00; F15C3/002; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391; Y10T137/206; Y10T137/2224; Y10T137/4456; Y10T137/4643; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412
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) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |