USRE27869E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pitch matching detecting and counting system
Assignee: Spartanics Ltd
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Filing: 1972-08-15
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Granted: 1974-01-01
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Expires: 1992-08-15
Abstract
Abstract AN APPARATUS FOR COUNTING STACKED SHEETLIKE MATERIALS HAVING NO SHEET SEPARATION REQUIREMENTS. THE ACTIVE AREA OF THE SENSOR ARRAY IS MATCHED TO THE WIDTH OF A SHEET OF THE STACK AND THE SENSOR ARRAY CAUSED TO TRANSVERSE THE STACK, THE COMPLEX SIGNAL OUTPUT OF THE SENSOR ARRAY BEING STRIPPED OF THE UNWANTED COMPONENTS IN A HIGH GAIN, DIODE CLAMPED CAPACITIVE INPUT OPERATIONAL AMPLIFIER WHOSE SQUARE WAVE OUTPUT IS PROCESSED AND COUNTED IN CONVENTIONAL COUNTING CIRCUITS.
Inventors
- 👤 Samuel P Willits
- 👤 William L Mohan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:36
CPC Classifications
H; H03; H03K; H03K21/00; H03K21/02; G; G06; G06M; G06M1/00; G06M1/08; G06M1/10; G06M1/101; G06M9/00; B; B65; B65H; B65H2301/00; B65H2301/50; B65H2301/54; B65H2301/541
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |