US2602740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensitive diazotype sheet for screen reflectography comprising a screen skin
Assignee: Chemische Fabriek L Van der Grinten NV
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Filing: 1948-12-29
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Granted: 1952-07-08
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Expires: 1968-12-29
Abstract
No abstract record available.
Inventors
- 👤 Lodewijk Pieter Frans Grinten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:01
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A SCREENED SENSITIZED DIAZOTYPE SHEET FOR REFLECTOGRAPHY COMPRISING A FLEXIBLE BASE TRANSPARENT TO THE EXPOSING LIGHT CARRYING OVER THE SIDE A LIGH-SENSITIVE DIAZO LAYER AND FIRMLY ADHERING BUT SEPARABLE SKIN UNITED WITH A SCREEN THE PATTERN OF WHICH CONSISTS OF A MYRIAD OF INTERSPERSED MINUTE AREAS RESPECITIVELY TRANSPARENT AND OPAQUE TO SUCH LIGHT, SAID SHEET POSSESSING A CREASING ABILITY, AS HEREINBEFORE DEFINED, OF BETWEEN 3* AND 15* SO THAT THE SCREEN SKIN AND THE REMAINDER OF THE SHEET COHERE AS A UNIT DURING
Claim 2
Dependent Claim
83 words
A SCREENED SENSITIZED DIAZOTYPE SHEET FOR REFLECTOGRAPHY COMPRISING A FLEXIBLE BASE TRANSPARENT TO THE EXPOSING LIGHT CARRYING OVER THE SIDE A LIGH-SENSITIVE DIAZO LAYER AND FIRMLY ADHERING BUT SEPARABLE SKIN UNITED WITH A SCREEN THE PATTERN OF WHICH CONSISTS OF A MYRIAD OF INTERSPERSED MINUTE AREAS RESPECITIVELY TRANSPARENT AND OPAQUE TO SUCH LIGHT, SAID SHEET POSSESSING A CREASING ABILITY, AS HEREINBEFORE DEFINED, OF BETWEEN 3* AND 15* SO THAT THE SCREEN SKIN AND THE REMAINDER OF THE SHEET COHERE AS A UNIT DURING
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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) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |