US3090534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web guide control
Assignee: Electric Eye Equipment Co
•
Filing: 1959-03-24
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Granted: 1963-05-21
•
Expires: 1979-03-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Frommer
- 👤 Ulrich R Furst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:45
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/02; B65H23/032; B65H23/038
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
IN A SYSTEM IN WHICH WEB IS STEERED TO KEEP SAME CENTERED AS IT PASSES THROUGH A MACHINE HAVING SCANNERS SCANNING THE EDGES OF THE WEB, A COMPARISON AMPLIFIER FOR COMPARING SIGNALS FORM SAID SCANNERS AND PROVIDING DIFFERENTIAL CURRENT OUTPUTS WHICH INCLUDES A PAIR OF SIGNAL CHANNELS EACH HAVING AT LEAST A CATHODE FOLLOWER STAGE WITH THE CATHODES CONNECTED TOGETHER, AND A PAIR OF AMPLIFIER STAGES DRIVEN RESPECTIVELY BY THE CATHODE FOLLOWER STAGES, THE CATHODE FOLLOWER STAGES CONNECTED FOR PROVIDING MAXIMUM DEGENERATION WHEN THE SIGNAL INPUTS
References Cited (Backward Citations)
US2451816A
Cited
US2722415A
Cited
US2840371A
Cited
US2866407A
Cited
US2883559A
Cited
US2840722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |