US3092004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light box
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1960-02-23
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Granted: 1963-06-04
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Expires: 1980-02-23
Abstract
No abstract record available.
Inventors
- 👤 Richard B Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:50
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
FOR USE IN A LIGHT BOX IN WHICH IS SUPPORTED A LIGHTTRANSMISSIVE WORK PLATE, SAID WORK PLATE HAVING A WORKING SURFACE UPON WHICH LIGHT-SENSITIVE MEDIA MAY BE PLACED AND AN ILLUMINABLE SURFACE DESIGNATED FOR EXPOSURE TO A LIGHT SOURCE, SAID WORK PLATE HAVING AT LEAST ONE PERIPHERAL WORKING EDGE DESIGNATED FOR USEFUL CONTACT AT ITS EXTREMITY WITH LIGHT-SENSITIVE MEDIA, A STRUCTURE COMPRISING: A SUPPORTING MEMBER COMPRISED OF A LIGHT-TRANSMISSIVE MATERIAL HAVING ONE EDGE THEREOF CONFORMED FOR CLOSE FITTING ABUTMENT WITH THE PERIPHERAL WORKING EDGE OF THE WORK PLATE AND LIGHT-REFLECTIVE COATING APPLIED TO THAT SURFACE OF SAID SUPPORTING MEMBER
Claim 2
Dependent Claim
99 words
FOR USE IN A LIGHT BOX IN WHICH IS SUPPORTED A LIGHTTRANSMISSIVE WORK PLATE, SAID WORK PLATE HAVING A WORKING SURFACE UPON WHICH LIGHT-SENSITIVE MEDIA MAY BE PLACED AND AN ILLUMINABLE SURFACE DESIGNATED FOR EXPOSURE TO A LIGHT SOURCE, SAID WORK PLATE HAVING AT LEAST ONE PERIPHERAL WORKING EDGE DESIGNATED FOR USEFUL CONTACT AT ITS EXTREMITY WITH LIGHT-SENSITIVE MEDIA, A STRUCTURE COMPRISING: A SUPPORTING MEMBER COMPRISED OF A LIGHT-TRANSMISSIVE MATERIAL HAVING ONE EDGE THEREOF CONFORMED FOR CLOSE FITTING ABUTMENT WITH THE PERIPHERAL WORKING EDGE OF THE WORK PLATE AND LIGHT-REFLECTIVE COATING APPLIED TO THAT SURFACE OF SAID SUPPORTING MEMBER
References Cited (Backward Citations)
US2227850A
Cited
US2511102A
Cited
FR1084916A
Cited
US2745946A
Cited
GB780508A
Cited
US2998763A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |