US2750836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monochromator system for spectrochemical analysis
Assignee: Leeds and Northrup Co
•
Filing: 1954-07-27
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Granted: 1956-06-19
•
Expires: 1974-07-27
Abstract
No abstract record available.
Inventors
- 👤 William G Fastie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:39
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/04; G01J3/12; G01J3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN AN ASTIGMATIC OPTICAL SYSTEM INCLUDING REFLECTING MEANS AND DISPERSING MEANS DISPOSED FOR DIRECTING DISPERSED RADIANT ENERGY TO SAID REFLECTING MEANS, SAID DISPERSING MEANS BEING DISPOSED ON THE CENTRAL AXIS OF SAID SYSTEM, MEANS FOR IMPROVING THE SPECTRAL RESOLUTION OF THE SYSTEM WHEN USING SLITS OF SUBSTANTIAL LENGTH COMPRISING A CIRCULAR SLIT FOR PASSAGE THERETHROUGH OF RADIANT ENERGY FROM A SOURCE TO SAID DISPERSING MEANS, A LIKE CIRCULAR SLIT FOR RECEIVING THEREAT AN IMAGE OF SAID FIRST-NAMED SLIT FORMED BY REFLECTED SUBSTANTIALLY MONOCHROMATIC DISPERSED RADIANT ENERGY FROM SAID SOURCE, EACH POINT OF SAID FIRST-NAMED CIRCULAR SLIT BEING IMAGED AS A SHORT STRAIGHT DISPOSED OPPOSITE EACH OTHER ON THE CIRCUMFERENCE OF A COMMON CIRCLE HAVING ITS CENTER ON SAID AXIS OF SAID OPTICAL SYSTEM AND IN THE FOCAL PLANE OF SAID REFLECTING MEANS.
Claim 2
Dependent Claim
132 words
IN AN ASTIGMATIC OPTICAL SYSTEM INCLUDING REFLECTING MEANS AND DISPERSING MEANS DISPOSED FOR DIRECTING DISPERSED RADIANT ENERGY TO SAID REFLECTING MEANS, SAID DISPERSING MEANS BEING DISPOSED ON THE CENTRAL AXIS OF SAID SYSTEM, MEANS FOR IMPROVING THE SPECTRAL RESOLUTION OF THE SYSTEM WHEN USING SLITS OF SUBSTANTIAL LENGTH COMPRISING A CIRCULAR SLIT FOR PASSAGE THERETHROUGH OF RADIANT ENERGY FROM A SOURCE TO SAID DISPERSING MEANS, A LIKE CIRCULAR SLIT FOR RECEIVING THEREAT AN IMAGE OF SAID FIRST-NAMED SLIT FORMED BY REFLECTED SUBSTANTIALLY MONOCHROMATIC DISPERSED RADIANT ENERGY FROM SAID SOURCE, EACH POINT OF SAID FIRST-NAMED CIRCULAR SLIT BEING IMAGED AS A SHORT STRAIGHT DISPOSED OPPOSITE EACH OTHER ON THE CIRCUMFERENCE OF A COMMON CIRCLE HAVING ITS CENTER ON SAID AXIS OF SAID OPTICAL SYSTEM AND IN THE FOCAL PLANE OF SAID REFLECTING MEANS.
References Cited (Backward Citations)
US2594334A
Cited
US2638811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-19 | 1959-12-19 | 1960-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-19 | 1963-12-19 | 1964-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-19 | 1967-12-19 | 1968-06-19 | $7700.00 | Window Closed / Lapsed |