Patent US2733637A successfully refreshed from Google Patents.
US2733637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
joseph
Assignee: —
•
Filing: —
•
Granted: 1956-02-07
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Expires: 1973-02-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:10
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; G02B5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A CIRCULAR MIRROR COMPRISING IN COMBINATION A FLIXIBLE ROUND DISC HAVING LATERAL THINNESS AND A RELATIVELY GREAT BREADTH, A CIRCUMFERENTIAL EDGE AROUND SAID DISC, A REFLECTING SURFACE ON ONE SIDE OF SAID DISC, A CIRCULAR FRAME ENCOMPASSING THE CIRCUMFERENCE OF SAID DISC, AN ANNULAR GROOVE IN THE INNER SIDE OF SAID CIRCULAR FRAME HAVING A SUBSTANTIALLY GREATER THICKNESS THAN SAID THIN DISC, SAID GROOVE RECEIVING SAID CIRCUMFERENTIAL EDGE, A SURFACE IN SAID GROOVE AT AN ACUTE ANGLE TO THE BREADTH OF SAID DISC, AND CIRCUMFERENTIAL EDGE MERELY RESTING AGAINST SAID SURFACE; AND MEANS FOR CONSTRICTING SAID FRAME ON SAID DISC TO REDUCE THE PLANE AREA ENCLOSED BY SAID FRAME AND SHORTEN THE CIRCUMFERENCE OF SAID ANNULAR GROOVE WHEREBY SAID DISC FLEXED AND BEARS AGAINST SAID SURFACE.
Claim 2
Dependent Claim
126 words
A CIRCULAR MIRROR COMPRISING IN COMBINATION A FLIXIBLE ROUND DISC HAVING LATERAL THINNESS AND A RELATIVELY GREAT BREADTH, A CIRCUMFERENTIAL EDGE AROUND SAID DISC, A REFLECTING SURFACE ON ONE SIDE OF SAID DISC, A CIRCULAR FRAME ENCOMPASSING THE CIRCUMFERENCE OF SAID DISC, AN ANNULAR GROOVE IN THE INNER SIDE OF SAID CIRCULAR FRAME HAVING A SUBSTANTIALLY GREATER THICKNESS THAN SAID THIN DISC, SAID GROOVE RECEIVING SAID CIRCUMFERENTIAL EDGE, A SURFACE IN SAID GROOVE AT AN ACUTE ANGLE TO THE BREADTH OF SAID DISC, AND CIRCUMFERENTIAL EDGE MERELY RESTING AGAINST SAID SURFACE; AND MEANS FOR CONSTRICTING SAID FRAME ON SAID DISC TO REDUCE THE PLANE AREA ENCLOSED BY SAID FRAME AND SHORTEN THE CIRCUMFERENCE OF SAID ANNULAR GROOVE WHEREBY SAID DISC FLEXED AND BEARS AGAINST SAID SURFACE.
References Cited (Backward Citations)
US408511A
Cited
US683163A
Cited
US713643A
Cited
US1269422A
Cited
DE499079C
Cited
DE501072C
Cited
US2051791A
Cited
US2300251A
Cited
US2555387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-06 | 1959-08-08 | 1960-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-06 | 1963-08-08 | 1964-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-06 | 1967-08-08 | 1968-02-07 | $7700.00 | Window Closed / Lapsed |