Patent US2835575A successfully refreshed from Google Patents.
US2835575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic reproduction process
Assignee: Eastman Kodak Co
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Filing: 1955-04-05
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Granted: 1958-05-20
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Expires: 1975-04-05
Abstract
No abstract record available.
Inventors
- 👤 Herbert B Cowden
- 👤 Albert W Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:24
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/315
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A PHOTOGRAPHIC REPRODUCTION PROCESS WHICH COMPRISES EXPOSING TO A TWO-TONE SUBJECT AN UNHARDENED GELATINO-SILVER HALIDE EMULSION LAYER A TEST PORTION OF EWHICH UPON EXPOSURE RO A LIGHT INTENSITY SCALE FOR A FIXED TIME BETWEEN 1/11 AND 1 SECOND AND DEVELOPMENT FOR 3 MINUTES AT 20*C. IN THE FOLLOWING INTERNAL TYPE DEVELOPER (11):
Claim 2
Dependent Claim
52 words
A PHOTOGRAPHIC REPRODUCTION PROCESS WHICH COMPRISES EXPOSING TO A TWO-TONE SUBJECT AN UNHARDENED GELATINO-SILVER HALIDE EMULSION LAYER A TEST PORTION OF EWHICH UPON EXPOSURE RO A LIGHT INTENSITY SCALE FOR A FIXED TIME BETWEEN 1/11 AND 1 SECOND AND DEVELOPMENT FOR 3 MINUTES AT 20*C. IN THE FOLLOWING INTERNAL TYPE DEVELOPER (11):
References Cited (Backward Citations)
US2596756A
Cited
US2716059A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |