Patent US3343446A successfully refreshed from Google Patents.
US3343446A
Expired / Lapsed
US
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Optical element utilizable as entrance or exit gate for spectrometric apparatus
Assignee: Office National d'Études et de Recherches Aérospatiales
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Filing: 1962-02-27
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Granted: 1967-09-26
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Expires: 1982-02-27
Abstract
No abstract record available.
Inventors
- 👤 Girard Andre Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:17
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28; G01J3/2846
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
AN OPTICAL ELEMENT ADAPTED TO BE USED AS A GATE FOR RADIANT FLUX IN SPECTROMETRIC APPARATUS, COMPRISING A FLAT BODY WITH A SURFACE DIVIDED INTO TWO SETS OF ZONES OF DIFFERENT TRANSMISSIVITY FOR SAID FLUX ALTERNATING ALONG SAID SURFACE, THE COMBINED AREA OF ONE SET OF ZONES BEING SUBSTANTIALLY EQUAL TO THAT OF THE OTHER, SAID ZONES BEING SEPARATED FROM ONE ANOTHER BY BOUNDARY CURVES OF GENERALLY HYPERBOLICAL SHAPE DIVIDED INTO A FIRST GROUP WITH RELATIVELY WIDE SPACING ALONG A PREDETERMINED DIRECTION BETWEEN SUCCESSIVE CURVES, A SECOND GROUP REMOTE FROM SAID FIRST GROUP WITH RELATIVELY NARROW SPACING ALONG SAID DIRECTION BETWEEN SUCCESSIVE CURVES, AND AN INTERVENING THIRD GROUP WHEREIN THE SPACING OF THE CURVES ALONG SAID DIRECTION RANGES BETWEEN SAID RELATIVELY WIDE AND SAID RELATIVELY NARROW SPACING.
Claim 2
Dependent Claim
127 words
AN OPTICAL ELEMENT ADAPTED TO BE USED AS A GATE FOR RADIANT FLUX IN SPECTROMETRIC APPARATUS, COMPRISING A FLAT BODY WITH A SURFACE DIVIDED INTO TWO SETS OF ZONES OF DIFFERENT TRANSMISSIVITY FOR SAID FLUX ALTERNATING ALONG SAID SURFACE, THE COMBINED AREA OF ONE SET OF ZONES BEING SUBSTANTIALLY EQUAL TO THAT OF THE OTHER, SAID ZONES BEING SEPARATED FROM ONE ANOTHER BY BOUNDARY CURVES OF GENERALLY HYPERBOLICAL SHAPE DIVIDED INTO A FIRST GROUP WITH RELATIVELY WIDE SPACING ALONG A PREDETERMINED DIRECTION BETWEEN SUCCESSIVE CURVES, A SECOND GROUP REMOTE FROM SAID FIRST GROUP WITH RELATIVELY NARROW SPACING ALONG SAID DIRECTION BETWEEN SUCCESSIVE CURVES, AND AN INTERVENING THIRD GROUP WHEREIN THE SPACING OF THE CURVES ALONG SAID DIRECTION RANGES BETWEEN SAID RELATIVELY WIDE AND SAID RELATIVELY NARROW SPACING.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |