US3246561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catoptric illumination means
Assignee: GAF Chemicals Corp
•
Filing: 1961-07-18
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Granted: 1966-04-19
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Expires: 1981-07-18
Abstract
No abstract record available.
Inventors
- 👤 Russell P Easton
- 👤 Binghamton First-City Natio Of
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:34
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/10; G01J3/46; G01J3/50; G01J3/501
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
IN AN OPTICAL ILLUMINATING DEVICE FOR USE IN THE COLOR REFLECTANCE ANALYSIS OF MATERIAL, PARTICULARLY FABRICS, COMPRISING A LIGHT-TIGHT CASING HAVING IN ONE WALL THEREOF AN APERTURE FOR THE ENTRY OF A BEAM OF LIGHT AND INCLUDING MEANS TO HOLD A SAMPLE OF THE MATERIAL TO BE TESTED AND A PHOTOTUBE, THE IMPROVEMENT WHICH COMPRISES THE COMBINATION OF A MIRROR HAVING A SEMI-CYLINDRICAL CONVEX REFLECTING SURFACE LOCATED NEAR AND INCLINED TOWARD SAID APERTURE AND SO ORIENTED AS TO HAVE ITS LONGITUDINAL AXIS SUBSTANTIALLY IN THE DIRECTION OF SAID BEAM AND TILTED AT AN ANGLE FOR INTERCEPTING SAID BEAM, SPREADING SAID BEAM OUT TO THE SHAPE OF THE SAMPLE, AND DIRECTING SAID BEAM TOWARD SAID SAMPLE AND AN ANNULAR ELLIPSOIDAL MIRROR SUPPORTED IN SAID CASING AND BEING SO ORIENTED THAT LIGHT PASSES TO SAID SAMPLE UNOBSTRUCTED THROUGH THE ANNULAR OPENING, SAID SAMPLE BEING SUBSTANTIALLY IN ONE OF THE FOCAL POINTS THEREOF AND SAID PHOTOTUBE IS SUBSTANTIALLY IN THE OTHER OF SAID FOCAL POINTS.
Claim 2
Dependent Claim
162 words
IN AN OPTICAL ILLUMINATING DEVICE FOR USE IN THE COLOR REFLECTANCE ANALYSIS OF MATERIAL, PARTICULARLY FABRICS, COMPRISING A LIGHT-TIGHT CASING HAVING IN ONE WALL THEREOF AN APERTURE FOR THE ENTRY OF A BEAM OF LIGHT AND INCLUDING MEANS TO HOLD A SAMPLE OF THE MATERIAL TO BE TESTED AND A PHOTOTUBE, THE IMPROVEMENT WHICH COMPRISES THE COMBINATION OF A MIRROR HAVING A SEMI-CYLINDRICAL CONVEX REFLECTING SURFACE LOCATED NEAR AND INCLINED TOWARD SAID APERTURE AND SO ORIENTED AS TO HAVE ITS LONGITUDINAL AXIS SUBSTANTIALLY IN THE DIRECTION OF SAID BEAM AND TILTED AT AN ANGLE FOR INTERCEPTING SAID BEAM, SPREADING SAID BEAM OUT TO THE SHAPE OF THE SAMPLE, AND DIRECTING SAID BEAM TOWARD SAID SAMPLE AND AN ANNULAR ELLIPSOIDAL MIRROR SUPPORTED IN SAID CASING AND BEING SO ORIENTED THAT LIGHT PASSES TO SAID SAMPLE UNOBSTRUCTED THROUGH THE ANNULAR OPENING, SAID SAMPLE BEING SUBSTANTIALLY IN ONE OF THE FOCAL POINTS THEREOF AND SAID PHOTOTUBE IS SUBSTANTIALLY IN THE OTHER OF SAID FOCAL POINTS.
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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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |