Patent US2544906A successfully refreshed from Google Patents.
US2544906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl azine sound track coating
Assignee: Eastman Kodak Co
•
Filing: 1947-08-16
•
Granted: 1951-03-13
•
Expires: 1967-08-16
Abstract
No abstract record available.
Inventors
- 👤 Veal Thomas Gentry
- 👤 George P Waugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:48
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/12; G03C5/14; G03C7/00; G03C7/22; G03C7/24; Y; Y10; Y10S; Y10S430/00; Y10S430/135
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
THE METHOD OF FORMING A SOUND TRACK IN A MULTI-LAYER PHOTOGRAPHIC FILM HAVING A PLURALITY OF SILVER HALIDE EMULSION LAYERS SENSITIVE TO DIFFERENT SPECTRAL REGIONS, WITH SOUND AND PICTURE AREAS, WHICH COMPRISES EXPOSING SAID FILM IN BOTH THE SOUND TRACK AND PICTURE AREAS, DEVELOPING A SILVER SOUND TRACK IN THE SOUND AREA OF SAID FILM AND NEGATIVE SILVER PICTURE IMAGES IN THE PICTURE AREA OF SAID FILM, VARNISHING ONLY THE SOUND TRACT AREA WITH A POLYMERIZED VINYL AZINE, PROCESSING THE FILM TO FORM POSITIVE DYE IMAGES BY COLOR DEVELOPMENT IN THE PICTURE AREA OF SAID FILM AND REMOVING DEVELOPED SILVER FROM SAID PICTURE AREA WITHOUT AFFECTING THE NEGATIVE SILVER SOUND IMAGE, AND THEN REMOVING THE VARNISH FROM THE SOUND TRACK AREA IN AN ACID SOLUTION AND FIXING BOTH AREAS OF SAID FILM.
Claim 2
Independent Claim
132 words
THE METHOD OF FORMING A SOUND TRACK IN A MULTI-LAYER PHOTOGRAPHIC FILM HAVING A PLURALITY OF SILVER HALIDE EMULSION LAYERS SENSITIVE TO DIFFERENT SPECTRAL REGIONS, WITH SOUND AND PICTURE AREAS, WHICH COMPRISES EXPOSING SAID FILM IN BOTH THE SOUND TRACK AND PICTURE AREAS, DEVELOPING A SILVER SOUND TRACK IN THE SOUND AREA OF SAID FILM AND NEGATIVE SILVER PICTURE IMAGES IN THE PICTURE AREA OF SAID FILM, VARNISHING ONLY THE SOUND TRACT AREA WITH A POLYMERIZED VINYL AZINE, PROCESSING THE FILM TO FORM POSITIVE DYE IMAGES BY COLOR DEVELOPMENT IN THE PICTURE AREA OF SAID FILM AND REMOVING DEVELOPED SILVER FROM SAID PICTURE AREA WITHOUT AFFECTING THE NEGATIVE SILVER SOUND IMAGE, AND THEN REMOVING THE VARNISH FROM THE SOUND TRACK AREA IN AN ACID SOLUTION AND FIXING BOTH AREAS OF SAID FILM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |