US2741941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectrophotometer with slit-width control
Assignee: Beckman Coulter Inc
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Filing: 1954-09-02
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Granted: 1956-04-17
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Expires: 1974-09-02
Abstract
No abstract record available.
Inventors
- 👤 Madsen Royal Glen
- 👤 Michael E Stickney
- 👤 Roland C Hawes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:09
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN A SPECTROPHOTOMETRIC APPARATUS, THE COMBINATION OF: A DISPERSING MEANS; MEANS DEFINING VARIABLE ENTRANCE AND EXIT SLITS RESPECTIVELY POSITIONED TO ADMIT RADIATION TO AND RECEIVE SELECTED WAVELENGTHS OF RADIATION FROM SAID DISPERSING MEANS; SLIT DRIVE MEANS OPERATIVELY CONNECTED TO SAID SLIT DEFINING MEANS FOR VARYING THE WIDTHS OF SAID SLITS; WAVELENGTH DRIVE MEANS OPERATIVELY CONNECTED TO SAID DISPERSING MEANS FOR VARYING SAID SELECTED WAVELENGTHS OF RADIATION; OUTPUT SIGNAL GENERATING MEANS POSITIONED TO RECEIVE SAID SELECTED WAVELENGTHS OF RADIATION FROM SAID DISPERSING MEANS THORUGH SAID EXIT SLIT; CONTROL MEANS OPERATIVELY CONNECTED TO SAID OUTPUT SIGNAL GENERATING MEANS AND SAID SLIT DRIVE MEANS FOR SO VARYING THE WIDTHS OF SAID SLITS IN RESPONSE TO ANY VARIATION IN SAID OUTPUT SIGNAL, WHILE SAID WAVELENGTH DRIVE MEANS IS IN OPERATION, AS TO MAINTAIN SAID OUTPUT SIGNAL SUBSTANTIALLY CONSTANT, WHEREBY THE WIDTHS OF SAID SLITS ARE VARIED AS A PARTICULAR FUNCTION OF SELECTED WAVELENGTH; MEANS FOR
Claim 2
Dependent Claim
151 words
IN A SPECTROPHOTOMETRIC APPARATUS, THE COMBINATION OF: A DISPERSING MEANS; MEANS DEFINING VARIABLE ENTRANCE AND EXIT SLITS RESPECTIVELY POSITIONED TO ADMIT RADIATION TO AND RECEIVE SELECTED WAVELENGTHS OF RADIATION FROM SAID DISPERSING MEANS; SLIT DRIVE MEANS OPERATIVELY CONNECTED TO SAID SLIT DEFINING MEANS FOR VARYING THE WIDTHS OF SAID SLITS; WAVELENGTH DRIVE MEANS OPERATIVELY CONNECTED TO SAID DISPERSING MEANS FOR VARYING SAID SELECTED WAVELENGTHS OF RADIATION; OUTPUT SIGNAL GENERATING MEANS POSITIONED TO RECEIVE SAID SELECTED WAVELENGTHS OF RADIATION FROM SAID DISPERSING MEANS THORUGH SAID EXIT SLIT; CONTROL MEANS OPERATIVELY CONNECTED TO SAID OUTPUT SIGNAL GENERATING MEANS AND SAID SLIT DRIVE MEANS FOR SO VARYING THE WIDTHS OF SAID SLITS IN RESPONSE TO ANY VARIATION IN SAID OUTPUT SIGNAL, WHILE SAID WAVELENGTH DRIVE MEANS IS IN OPERATION, AS TO MAINTAIN SAID OUTPUT SIGNAL SUBSTANTIALLY CONSTANT, WHEREBY THE WIDTHS OF SAID SLITS ARE VARIED AS A PARTICULAR FUNCTION OF SELECTED WAVELENGTH; MEANS FOR
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |