Patent US2400640A successfully refreshed from Google Patents.
US2646366A
Expired / Lapsed
US
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Backing paper for roll photographic film
Assignee: Eastman Kodak Co
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Filing: 1951-12-08
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Granted: 1953-07-21
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Expires: 1971-12-08
Abstract
No abstract record available.
Inventors
- 👤 Ernest L Baxter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:19
CPC Classifications
G; G03; G03C; G03C3/00; G03C3/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24876; Y10T428/26; Y10T428/263
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
PHOTOGRAPHIC BACKING PAPER HAVING AN OVERALL THICKNESS LESS THAN 0.0040 INCH COMPRISING A SINGLE SHEET OF KRAFT PAPER, AS CONTRASTED TO A MULTIPLE SHEET OF DUPLEX PAPER, OF A THICKNESS OF APPROXIMATELY 0.0026 INCH WHICH WILL PERMIT PASSAGE OF SUBSTANTIAL AMOUNTS OF ACTINIC LIGHT HAVING ON ONE SIDE AN OPAQUING COATING COMPRISING CARBON BLACK IN A POLYVINYL ACETATE BINDER WHICH IS OVERCOATED WITH A SECOND OPAQUING COATING COMPRISING CARBON BLACK IN A ZEIN BINDER, A LIGHTER COLORED PIGMENTED COATING ON THE OPPOSITE SURFACE OF THE PAPER COMPRISING A
Claim 2
Dependent Claim
88 words
PHOTOGRAPHIC BACKING PAPER HAVING AN OVERALL THICKNESS LESS THAN 0.0040 INCH COMPRISING A SINGLE SHEET OF KRAFT PAPER, AS CONTRASTED TO A MULTIPLE SHEET OF DUPLEX PAPER, OF A THICKNESS OF APPROXIMATELY 0.0026 INCH WHICH WILL PERMIT PASSAGE OF SUBSTANTIAL AMOUNTS OF ACTINIC LIGHT HAVING ON ONE SIDE AN OPAQUING COATING COMPRISING CARBON BLACK IN A POLYVINYL ACETATE BINDER WHICH IS OVERCOATED WITH A SECOND OPAQUING COATING COMPRISING CARBON BLACK IN A ZEIN BINDER, A LIGHTER COLORED PIGMENTED COATING ON THE OPPOSITE SURFACE OF THE PAPER COMPRISING A
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) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |