US2670288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic tracing cloth
Assignee: Eastman Kodak Co
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Filing: 1951-11-30
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Granted: 1954-02-23
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Expires: 1971-11-30
Abstract
No abstract record available.
Inventors
- 👤 Carl F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:15
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/7642
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PHOTOGRAPHIC TRACING CLOTH HAVING IMPROVED LIGHT TRANSMISSION COMPRISING A SIZED CLOTH BASE, A LAYER OF HYDROLYZED POLYVINYL ACETATE HAVING A VINYL ACETATE CONTENT OF 27 TO 40% ON EACH SIDE OF THE CLOTH BASE, A SEPARATE LAYER OF CELLULOSE NITRATE OVER EACH OF THE HYDROLYZED
Claim 2
Dependent Claim
46 words
A PHOTOGRAPHIC TRACING CLOTH HAVING IMPROVED LIGHT TRANSMISSION COMPRISING A SIZED CLOTH BASE, A LAYER OF HYDROLYZED POLYVINYL ACETATE HAVING A VINYL ACETATE CONTENT OF 27 TO 40% ON EACH SIDE OF THE CLOTH BASE, A SEPARATE LAYER OF CELLULOSE NITRATE OVER EACH OF THE HYDROLYZED
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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |