US3612702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web defect determination by laser beam irradiation and reflected light examination
Assignee: Iris Corp
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Filing: 1969-09-09
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Granted: 1971-10-12
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Expires: 1989-09-09
Abstract
Abstract A laser beam is caused to scan a moving web transversely of the web direction of motion at a predetermined rate, and the detected light accumulated from one linear scan. The accumulated light is analyzed by a photomultiplier feeding a comparator, for example a differential amplifier, having one of its inputs at a reference potential.
Inventors
- 👤 John H Troll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:48
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/89
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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |