US3202813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: EDNA LITE CORP
•
Filing: 1962-12-20
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Granted: 1965-08-24
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Expires: 1982-12-20
Abstract
No abstract record available.
Inventors
- 👤 Alex J Weinstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:43
CPC Classifications
F; F21; F21V; F21V33/00; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN A DCEVICE OF THE DESCRIBED CHARACTER, THE COMBINATION OF A HOUSING HAVING A LIGHT TRANSMITTING PLATE AT THE TOP THEREOF, A LIGHT SOURCE WITHIN SAID HOUSING REFLECTING MEANS IN SAID HOUSING FOR EFFECTING SUBSTANTIALLY UNIFORM ILLUMINATION OF SAID PLATE FROM SAID LIGHT SOURCE, ANDN A PLURALITY OF SUPPORT MEMBERS MOUNTED ON SAID TOP OF THE HOUSING AT SPACED APART LOCATIONS ADJACENT THE PERIPHERY OF SAID LIGHT TRANSMITTING PLATE, EACH OF SAID SUPPORT MEMBERS BEING STEPPED UPWARDLY IN THE DIRECTION AWAY FROM SAID PLATE TO DEFINE UPWARDLY FACING SUPPORT SURFACES AT DIFFERENT LEVELS AND AT DIFFERENT DISTANCES FROM SAID PERIPHERY OF THE PLATE FOR SUPPORTING INTERCHANGEABLE SUPERPOSED FILTERS AND SPECIMEN BEARING GLASS STAGES ABOVE SAID LIGHT TRANSMITTING PLATE.
Claim 2
Dependent Claim
118 words
IN A DCEVICE OF THE DESCRIBED CHARACTER, THE COMBINATION OF A HOUSING HAVING A LIGHT TRANSMITTING PLATE AT THE TOP THEREOF, A LIGHT SOURCE WITHIN SAID HOUSING REFLECTING MEANS IN SAID HOUSING FOR EFFECTING SUBSTANTIALLY UNIFORM ILLUMINATION OF SAID PLATE FROM SAID LIGHT SOURCE, ANDN A PLURALITY OF SUPPORT MEMBERS MOUNTED ON SAID TOP OF THE HOUSING AT SPACED APART LOCATIONS ADJACENT THE PERIPHERY OF SAID LIGHT TRANSMITTING PLATE, EACH OF SAID SUPPORT MEMBERS BEING STEPPED UPWARDLY IN THE DIRECTION AWAY FROM SAID PLATE TO DEFINE UPWARDLY FACING SUPPORT SURFACES AT DIFFERENT LEVELS AND AT DIFFERENT DISTANCES FROM SAID PERIPHERY OF THE PLATE FOR SUPPORTING INTERCHANGEABLE SUPERPOSED FILTERS AND SPECIMEN BEARING GLASS STAGES ABOVE SAID LIGHT TRANSMITTING PLATE.
References Cited (Backward Citations)
US1887288A
Cited
US1929846A
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US2051466A
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US2255319A
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US2349853A
Cited
US2415635A
Cited
DE840533C
Cited
US2827554A
Cited
US2878372A
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 |