Patent US3235630A successfully refreshed from Google Patents.
US3235630A
Expired / Lapsed
US
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Method of making an optical tool
Assignee: Arthur D Little Inc
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Filing: 1962-07-17
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Granted: 1966-02-15
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Expires: 1982-07-17
Abstract
No abstract record available.
Inventors
- 👤 Paul E Doherty
- 👤 Jr Henry H Blau
- 👤 Richard S Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:29
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; G02B5/3058; G02B5/18; G02B5/1847; G02B5/1852
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
METHOD OF FORMING A FINE WIRE GRID, COMPRISING THE STEPS OF (A) ELECTROPOLISHING THE SURFACE OF AN ALUMINUM CRYSTAL THEREBY TO FORM PERIODIC CORRUGATIONS MADE UP OF RECURRING VALLEYS AND PEAKS ON SAID SURFACE, SAID SURFACE BEING DEFINED AS ANY PLANE RESULTING FROM ROTATING A (110) PLANE ABOUT THE CRYSTAL AXIS IN A <110> DIRECTION UP TO 36 DEGREES AND IN A <100> DIRECTION UP TO 15 DEGREES; (B) FORMING A THIN FILM REPLICA OF SAID CORRUGATED SURFACE; AND (C) SHADOWING THE PEAKS OF SAID FILM REPLICA TO FORM A GRIDWORK OF VERY FINE LINES ABOUT 350 A. APART.
Claim 2
Dependent Claim
99 words
METHOD OF FORMING A FINE WIRE GRID, COMPRISING THE STEPS OF (A) ELECTROPOLISHING THE SURFACE OF AN ALUMINUM CRYSTAL THEREBY TO FORM PERIODIC CORRUGATIONS MADE UP OF RECURRING VALLEYS AND PEAKS ON SAID SURFACE, SAID SURFACE BEING DEFINED AS ANY PLANE RESULTING FROM ROTATING A (110) PLANE ABOUT THE CRYSTAL AXIS IN A <110> DIRECTION UP TO 36 DEGREES AND IN A <100> DIRECTION UP TO 15 DEGREES; (B) FORMING A THIN FILM REPLICA OF SAID CORRUGATED SURFACE; AND (C) SHADOWING THE PEAKS OF SAID FILM REPLICA TO FORM A GRIDWORK OF VERY FINE LINES ABOUT 350 A. APART.
References Cited (Backward Citations)
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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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |