US3202070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diazotype copying apparatus
Assignee: GAF Chemicals Corp
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Filing: 1962-11-15
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Granted: 1965-08-24
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Expires: 1982-11-15
Abstract
No abstract record available.
Inventors
- 👤 Jr James L Pratt
- 👤 Donald W Gouldsmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:00
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/30; G03B27/303; G03B27/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
IN A PHOTOCOPYING APPARATUS PARTICULARLY FOR THE EXPOSURE OF DIAZOTYPE MATERIALS, A HOUSING HAVING TOP AND SIDE WALLS DEFINING AN ENCLOSURE OF SUBSTANTIALLY OBLONG SHAPE AND HAVING OPEN ENDS ADAPTED FOR THE PASSAGE OF AIR THERETHROUGH, A BOTTOM WALL FOR SAID HOUSING OF TRANSPARENT MATERIAL, A DICHROIC REFLECTOR OF PAPABOLIC SHAPE WITHIN SAID HOUSING, SAID REFLECTOR HAVING AN INTERFERENCE FILTER COATING FOR PASSING RADIATIONS OF THE INFRARED RANGE, BUT REFLECTING RADIATIONS IN THE ULTRAVIOLET RANGE, A TUBULAR MERCURY ARC LAMP IN THE FOCAL POINT OF SAID REFLECTOR, A TRANSPARENT GLASS PLATE BETWEEN SAID LAMP AND SAID BOTTOM WALL, SAID PLATE HAVING A COATING OF DICHROIC MATERIAL FORMING AN INTERFERENCE FILTER HAVING THE PROPERTY OF PASSING RADIATIONS IN THE ULTRAVIOLET RANGE, BUT REFLECTING RADIATIONS IN THE INFRARED RANGE, AND A PLURALITY OF RADIATION FINS ON THE INNER WALL OF SAID HOUSING FOR ABSORBING SAID REFLECTED RADIATIONS.
Claim 2
Dependent Claim
145 words
IN A PHOTOCOPYING APPARATUS PARTICULARLY FOR THE EXPOSURE OF DIAZOTYPE MATERIALS, A HOUSING HAVING TOP AND SIDE WALLS DEFINING AN ENCLOSURE OF SUBSTANTIALLY OBLONG SHAPE AND HAVING OPEN ENDS ADAPTED FOR THE PASSAGE OF AIR THERETHROUGH, A BOTTOM WALL FOR SAID HOUSING OF TRANSPARENT MATERIAL, A DICHROIC REFLECTOR OF PAPABOLIC SHAPE WITHIN SAID HOUSING, SAID REFLECTOR HAVING AN INTERFERENCE FILTER COATING FOR PASSING RADIATIONS OF THE INFRARED RANGE, BUT REFLECTING RADIATIONS IN THE ULTRAVIOLET RANGE, A TUBULAR MERCURY ARC LAMP IN THE FOCAL POINT OF SAID REFLECTOR, A TRANSPARENT GLASS PLATE BETWEEN SAID LAMP AND SAID BOTTOM WALL, SAID PLATE HAVING A COATING OF DICHROIC MATERIAL FORMING AN INTERFERENCE FILTER HAVING THE PROPERTY OF PASSING RADIATIONS IN THE ULTRAVIOLET RANGE, BUT REFLECTING RADIATIONS IN THE INFRARED RANGE, AND A PLURALITY OF RADIATION FINS ON THE INNER WALL OF SAID HOUSING FOR ABSORBING SAID REFLECTED RADIATIONS.
References Cited (Backward Citations)
US2552185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |