US2735331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for- optical inspection of glass sheets
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
•
Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:44
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/89; G01N21/892; G01N21/896
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
IN AN APPARATUS FOR INSPECTING GLASS SHEET FOR WEDGE EFFECTS PRODUCING DEVIATIONS OF LIGHT RAYS PASSING THERETHROUGH, IN COMBINATION, MEANS FOR CONVEYING GLASS SHEETS ALONG A DEFINITE PATH, A CONCAVE MIRROR BEHIND BUT ADJACENT TO AND FACING SAID CONVEYING MEANS, A POINT SOURCE OF LIGHT IN FRONT OF AND SPACED FROM SAID CONVEYING MEANS FOR ILLIMINATING THE MIRROR, AN OPAQUE SCREEN OF LIMITED
Claim 2
Dependent Claim
63 words
IN AN APPARATUS FOR INSPECTING GLASS SHEET FOR WEDGE EFFECTS PRODUCING DEVIATIONS OF LIGHT RAYS PASSING THERETHROUGH, IN COMBINATION, MEANS FOR CONVEYING GLASS SHEETS ALONG A DEFINITE PATH, A CONCAVE MIRROR BEHIND BUT ADJACENT TO AND FACING SAID CONVEYING MEANS, A POINT SOURCE OF LIGHT IN FRONT OF AND SPACED FROM SAID CONVEYING MEANS FOR ILLIMINATING THE MIRROR, AN OPAQUE SCREEN OF LIMITED
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) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |