US2876099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens screen and method of making the same
Assignee: Individual
•
Filing: 1953-08-18
•
Granted: 1959-03-03
•
Expires: 1973-08-18
Abstract
No abstract record available.
Inventors
- 👤 Schenk Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:37
CPC Classifications
G; G03; G03C; G03C9/00; G03C9/02; G03B; G03B21/00; G03B21/14; G03B21/32; G03F; G03F5/00; G03F5/02; G03F5/06; Y; Y10; Y10S; Y10S430/00; Y10S430/147
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A METHOD OF FORMING A LENS SCREEN FOR PHOTOGRAPHIC PURPOSES, COMPRISING THE STEPS OF EXPOSING THROUGH A SCREEN A PHOTOGRAPHIC ASSEMBLY OF A LAYER OF CHROMATE LIGHT SENSITIZED, TANNABLE MATERIAL SELECTED FROM THE GROUP CONSISTING OF GELATIN AND CELLULOSE HYDRATE, SAID LAYER CARRYING ON ITS TOP SURFACE A LIGHT SENSITIVE THIN SILVER HALIDE STRATUM, SAID EXPOSING STEP BEING PERFORMED THROUGH A NEGATIVE OF SAID SCREEN TO BE FORMED, WASHING OUT SAID CHROMATE WITHOUT REMOVING SAID TANNABLE MATERIAL AND DEVELOPING SAID SILVER HALIDE STRATUM WITH A TANNING DEVELOPER, SWELLING THE OUTER SURFACE OF SAID LAYER IN ORDER TO PREPARE A LENTICULAR OUTER SURFACE WITH A FORMATION OF A LENTICULAR SCREEN AND DRYING SAID LAYER.
Claim 2
Independent Claim
113 words
A METHOD OF FORMING A LENS SCREEN FOR PHOTOGRAPHIC PURPOSES, COMPRISING THE STEPS OF EXPOSING THROUGH A SCREEN A PHOTOGRAPHIC ASSEMBLY OF A LAYER OF CHROMATE LIGHT SENSITIZED, TANNABLE MATERIAL SELECTED FROM THE GROUP CONSISTING OF GELATIN AND CELLULOSE HYDRATE, SAID LAYER CARRYING ON ITS TOP SURFACE A LIGHT SENSITIVE THIN SILVER HALIDE STRATUM, SAID EXPOSING STEP BEING PERFORMED THROUGH A NEGATIVE OF SAID SCREEN TO BE FORMED, WASHING OUT SAID CHROMATE WITHOUT REMOVING SAID TANNABLE MATERIAL AND DEVELOPING SAID SILVER HALIDE STRATUM WITH A TANNING DEVELOPER, SWELLING THE OUTER SURFACE OF SAID LAYER IN ORDER TO PREPARE A LENTICULAR OUTER SURFACE WITH A FORMATION OF A LENTICULAR SCREEN AND DRYING SAID LAYER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |