Patent US3967495A successfully refreshed from Google Patents.
US3124637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for examining prestressed glass
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
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Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:41
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/24; G01L1/241
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
APPARATUS FOR INDICATING THE EXTENT OF STRESSES IN GLASS AND THE LIKE WHICH COMPRISES A SOURCE OF PARALLEL POLARIZED LIGHT RAYS, AN ANALYZER IN THE PATH OF SAID LIGHT PASSING TRANVERSELY THROUGH THE FULL AREA OF AN INTERMEDIATE SHEET OF GLASS UNDER INSPECTION, AN APERTURED ROTARY DISK FOR PERIODICALLY SCREENING SID PATH OF LIGHT AND LIGHT INDICATING MEANS FOR RECEIVING SAID SCREENED LIGHT.
Claim 2
Dependent Claim
63 words
APPARATUS FOR INDICATING THE EXTENT OF STRESSES IN GLASS AND THE LIKE WHICH COMPRISES A SOURCE OF PARALLEL POLARIZED LIGHT RAYS, AN ANALYZER IN THE PATH OF SAID LIGHT PASSING TRANVERSELY THROUGH THE FULL AREA OF AN INTERMEDIATE SHEET OF GLASS UNDER INSPECTION, AN APERTURED ROTARY DISK FOR PERIODICALLY SCREENING SID PATH OF LIGHT AND LIGHT INDICATING MEANS FOR RECEIVING SAID SCREENED LIGHT.
References Cited (Backward Citations)
GB635499A
Cited
DE731095C
Cited
US2332308A
Cited
FR974768A
Cited
US2715244A
Cited
US2750519A
Cited
US2803755A
Cited
US2864278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |