US2718170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slitless spectrophotometer
Assignee: Individual
•
Filing: 1951-06-06
•
Granted: 1955-09-20
•
Expires: 1971-06-06
Abstract
No abstract record available.
Inventors
- 👤 Lyot Bernard Ferdinand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:20
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/10; G01J3/0205; G01J3/0224
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A SLITLESS SPECTROPHOTOMETER ADAPTED TO BE POSITIONED IN THE PATH OF A BEAM OF LIGHT EMITTED BY THE SOURCE OF LIGHT TO BE EXAMINED AND CONCENTRATED BY CONVENTIONAL MEANS WHICH COMPRISES, FILTERING MEAND ADAPTED TO TRANSMIT A NARROW CHROMATIC BAND, POLARIZING MEANS, FIXED BIREFRINGENT MEANS ADAPTED TO TRANSMIT TWO COMPLEMENTARY CHANNELED SPECTRA POLARIZED IN TWO RECTANGULAR DIRECTIONS, COMPENSATING MEANS FOR MODIFYING THE INTENSITY RATIO OF THE TWO SPECTRA, MODULATING MEANS FOLLOWED BY POLARIZING MEANS FOR ALTERNATELY TRANSMITTING ONE OF THESE SPECTRA TO A PHOTO-ELECTRIC CELL WHILE INTERRUPTING THE OTHER OF SAID SPECTRA, MEANS FOR ADDING AND AMPLIFYING THE ALTERNATING CURRENTS PRODUCED, MEANS FOR RECTIFYING SAID CURRENTS, AND RECEIVING MEANS FOR THE RECTIFIED CURRENTS, WHEREIN SAID CURRENT ARE EMPLOYED FOR THE PURPOSE OF READING AND ACTUATING THE SAID COMPENSATING MEANS UNTIL SAID CURRENT IS NULLIFIED.
Claim 2
Dependent Claim
134 words
A SLITLESS SPECTROPHOTOMETER ADAPTED TO BE POSITIONED IN THE PATH OF A BEAM OF LIGHT EMITTED BY THE SOURCE OF LIGHT TO BE EXAMINED AND CONCENTRATED BY CONVENTIONAL MEANS WHICH COMPRISES, FILTERING MEAND ADAPTED TO TRANSMIT A NARROW CHROMATIC BAND, POLARIZING MEANS, FIXED BIREFRINGENT MEANS ADAPTED TO TRANSMIT TWO COMPLEMENTARY CHANNELED SPECTRA POLARIZED IN TWO RECTANGULAR DIRECTIONS, COMPENSATING MEANS FOR MODIFYING THE INTENSITY RATIO OF THE TWO SPECTRA, MODULATING MEANS FOLLOWED BY POLARIZING MEANS FOR ALTERNATELY TRANSMITTING ONE OF THESE SPECTRA TO A PHOTO-ELECTRIC CELL WHILE INTERRUPTING THE OTHER OF SAID SPECTRA, MEANS FOR ADDING AND AMPLIFYING THE ALTERNATING CURRENTS PRODUCED, MEANS FOR RECTIFYING SAID CURRENTS, AND RECEIVING MEANS FOR THE RECTIFIED CURRENTS, WHEREIN SAID CURRENT ARE EMPLOYED FOR THE PURPOSE OF READING AND ACTUATING THE SAID COMPENSATING MEANS UNTIL SAID CURRENT IS NULLIFIED.
References Cited (Backward Citations)
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Cited
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Cited
US2059786A
Cited
US2166824A
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US2383075A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-19 | 1959-03-21 | 1959-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-19 | 1963-03-21 | 1963-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-19 | 1967-03-21 | 1967-09-20 | $7700.00 | Window Closed / Lapsed |