Patent US3556664A successfully refreshed from Google Patents.
US3556664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for inspecting photographic materials
Assignee: Eastman Kodak Co
•
Filing: 1969-04-01
•
Granted: 1971-01-19
•
Expires: 1989-04-01
Abstract
Abstract RECIPROCITY-LAW FAILURE PERMITS PHOTOGRAPHIC MATERIAL TO BE INSPECTED BY LIGHT TO WHICH SUCH MATERIAL IS SENSITIVE. CAST IN THE ENVIRONMENT OF A "VISIBLE LIGHT" SCANNING SYSTEM FOR DETECTING SKIPS IN THE SENSITIZED COLOR COATS OF A PHOTOGRAPHIC WEB, APPARATUS ACCORDING TO THE INVENTION DEFINES WHAT IS TO BE DETECTED AS A DEFECT. AS DISCLOSED, VISIBLE LIGHT IS DIRECTED AT AND THROUGH A PHOTOGRAPHIC WEB, THE DISPERSED LIGHT EXITING FROM SUCH WEB BEING GATHERED BY A CYLINDRICAL LENS WHICH IS SO MASKED THAT IT MAY BE EMPLOYED, WITHOUT MODIFICATION, FOR WEBS OF VARIOUS WIDTHS.
Inventors
- 👤 William H Blaisdell
- 👤 Edward C Cornelius
- 👤 Howard J Emerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:22
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/89; G01N21/8914; G01N21/8916; G01N21/8901; G03; G03B; G03B35/00; G03B35/18; G03B35/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |