US3552852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film copying apparatus
Assignee: Peterson Enterprises Inc
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Filing: 1968-08-19
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Granted: 1971-01-05
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Expires: 1988-08-19
Abstract
Abstract IMPROVED FILM COPYING APPARATUS INCLUDING PROTECTIVE SYSTEMS WHICH, IN THE PREFERRED EMBODIMENT, CHECK EACH LIGHT VALVE FOR EACH LIGHT CHANGE AGAINST THE PREDETERMINED PROGRAM AND AUTOMATICALLY STOP THE EQUIPMENT AND IGNORE SUBSEQUENT INFORMATION WHENEVER AN OPERATIONAL ANOMALY IS OBSERVED.
Inventors
- 👤 Henry F Stemke
- 👤 William W Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:43
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/16
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |