US3389265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colorimeter for measuring the tristimulus coefficients of color in a laterally moving material
Assignee: EIDP Inc
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Filing: 1965-05-03
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Granted: 1968-06-18
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Expires: 1985-05-03
Abstract
No abstract record available.
Inventors
- 👤 Jay G Schreckendgust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:57
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/46; G01J3/50; G01J3/51; G01J3/513; G01J3/465
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A COLORIMETER FOR MEASURING THE COLOR CHARACTERISTICS OF LIGHT DIFFUSED FROM A MATERIAL WHICH COMPRISES (A) A LIGHT SOURCE FOR DIRECTING A COLLIMATED BEAM OF LIGHT, CONSISTING ESSENTIALLY OF WAVELENGTHS UP TO ABOUT 7000 ANGSTROM UNITS, AGAINST THE SURFACE OF SAID MATERIAL, (B) A PHOTOCELL MONITORING SAID LIGHT SOURCE, (C) RECEPTOR MEANS FOR RECEIVING A PORTION OF THE LIGHT OF SAID BEAM DIFFUSED FROM THE MATERIAL, SAID RECEPTOR MEANS COMPRISING (1) AN ELONGATED TUBE OPEN AT ONE END, SAID TUBE DISPOSED TO RECEIVE SAID PORTION OF LIGHT AT SAID OPEN END AND TRANSMIT THE DIFFUSED LIGHT TO THE CLOSED END, SAID TUBE HAVING BAFFLES DISPOSED THEREIN FOR INHIBITING SPURIOUS LIGHT FROM REACHING SAID CLOSED END,
Claim 2
Dependent Claim
115 words
A COLORIMETER FOR MEASURING THE COLOR CHARACTERISTICS OF LIGHT DIFFUSED FROM A MATERIAL WHICH COMPRISES (A) A LIGHT SOURCE FOR DIRECTING A COLLIMATED BEAM OF LIGHT, CONSISTING ESSENTIALLY OF WAVELENGTHS UP TO ABOUT 7000 ANGSTROM UNITS, AGAINST THE SURFACE OF SAID MATERIAL, (B) A PHOTOCELL MONITORING SAID LIGHT SOURCE, (C) RECEPTOR MEANS FOR RECEIVING A PORTION OF THE LIGHT OF SAID BEAM DIFFUSED FROM THE MATERIAL, SAID RECEPTOR MEANS COMPRISING (1) AN ELONGATED TUBE OPEN AT ONE END, SAID TUBE DISPOSED TO RECEIVE SAID PORTION OF LIGHT AT SAID OPEN END AND TRANSMIT THE DIFFUSED LIGHT TO THE CLOSED END, SAID TUBE HAVING BAFFLES DISPOSED THEREIN FOR INHIBITING SPURIOUS LIGHT FROM REACHING SAID CLOSED END,
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) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |