US3138957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential signal detecting apparatus
Assignee: Howell Instruments Inc
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Filing: 1960-11-09
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Granted: 1964-06-30
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Expires: 1980-11-09
Abstract
No abstract record available.
Inventors
- 👤 Raymond D Brunson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:28
CPC Classifications
G; G01; G01K; G01K1/00; G01K1/02; G01K1/022; G01K1/024; G08; G08C; G08C15/00; G08C15/06; G08C15/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
122 words
A DIFFERENTIAL DETECTION SYSTEM COMPRISING A PLURALITY OF MEANS EACH CARRYING A SIGNAL SUBJECT TO VARIATION IN VALUE, MEANS FOR CYCLICALLY SAMPLING SAID SIGNAL CARRYING MEANS, MEANS FOR CONCURRENTLY SELECTIVELY SAMPLING BOTH THE SIGNAL CARRYING MEANS CARRYING THE RELATIVELY HIGHEST VALUE SIGNAL AND THE RELATIVELY LOWEST VALUE SIGNAL, COMPARISON MEANS HAVING FIRST AND SECOND INPUTS AND AN OUTPUT, THE FIRST COMPARISON INPUT BEING SEQUENTIALLY CONNECTED VIA SAID CYCLIC SAMPLING MEANS TO SAID SIGNAL CARRYING MEANS, THE SECOND COMPARISON INPUT BEING CONNECTED TO ONE OF SAID SIGNAL CARRYING MEANS VIA SAID SELECTIVE SAMPLING MEANS, AND MEANS RESPONSIVE TO AN OUTPUT FROM SAID COMPARISON MEANS FOR OPERATING SAID SELECTIVE SAMPLING MEANS TO CONNECT SAID SECOND COMPARISON INPUT TO ANOTHER OF SAID SIGNAL CARRYING MEANS.
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |