US3679411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel frictional resistance motion picture film
Assignee: Polaroid Corp
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Filing: 1970-07-13
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Granted: 1972-07-25
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Expires: 1990-07-13
Abstract
Abstract EXPOSED MOTION PICTURE FILM IS PROCESSED WITH A DEVELOPING COMPOSITION CONTAINING A FRICTION REDUCING AGENT TO IMPART SLIP PROPERTIES TO THE FILM THEREBY MINIMIZING FRICTIONAL RESISTANCE AS THE FILM CONTACTS VARIOUS MECHANISMS INVOLVED IN TRANSPORTING, STORING AND PROJECTING FILM STRIPS, THUS MINIMIZING A LACK OF UNIFORMITY IN FILM TRANSPORT RATES AND OBVIATING DAMAGE TO THE FILM AS A RESULT OF FRICTIONAL RESISTANCE.
Inventors
- 👤 Robert K Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:31
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/81; G03C1/7614; Y; Y10; Y10S; Y10S430/00; Y10S430/135
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |