Patent US3158674A successfully refreshed from Google Patents.
US3158674A
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Interferometer for measuring distances normal to a plane
Assignee: General Precision Inc
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Filing: 1958-10-27
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Granted: 1964-11-24
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Expires: 1978-10-27
Abstract
No abstract record available.
Inventors
- 👤 Robert A Woodson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:34
CPC Classifications
G; G01; G01B; G01B9/00; G01B9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
IN AN INTERFEROMETER, AN OPTICALLY FLAT MEMBER, A PARTIAL REFLECTOR ON A FIRST PORTION OF SAID OPTICALLY FLAT MEMBER FOR RECEIVING INCIDENT RADIATION, A SUBSTANTIALLY FULL REFLECTOR ON A SECOND SUBSTANTIALLY COPLANAR PORTION OF SAID OPTICALLY FLAT MEMBER, A RETROREFLECTOR POSITIONED TO RETROREFLECT THAT PORTION OF SAID RADIATION WHICH IS TRANSMITTED BY SAID PARTIAL REFLECTOR PORTION OF SAID OPTICALLY FLAT MEMBER TO THE FULL REFLECTOR PORTION THEREOF AND TO RETROREFLECT THE RADIATION REFLECTED BY SAID FULL REFLECTOR PORTION BACK TO SAID PARTIAL REFLECTOR PORTION FOR RECOMBINATION OF A PORTION OF SAID RADIATION WITH THAT PORTION OF SAID RADIATION WHICH HAS BEEN ORIGINALLY REFLECTED BY SAID PARTIAL REFLECTOR.
Claim 2
Dependent Claim
107 words
IN AN INTERFEROMETER, AN OPTICALLY FLAT MEMBER, A PARTIAL REFLECTOR ON A FIRST PORTION OF SAID OPTICALLY FLAT MEMBER FOR RECEIVING INCIDENT RADIATION, A SUBSTANTIALLY FULL REFLECTOR ON A SECOND SUBSTANTIALLY COPLANAR PORTION OF SAID OPTICALLY FLAT MEMBER, A RETROREFLECTOR POSITIONED TO RETROREFLECT THAT PORTION OF SAID RADIATION WHICH IS TRANSMITTED BY SAID PARTIAL REFLECTOR PORTION OF SAID OPTICALLY FLAT MEMBER TO THE FULL REFLECTOR PORTION THEREOF AND TO RETROREFLECT THE RADIATION REFLECTED BY SAID FULL REFLECTOR PORTION BACK TO SAID PARTIAL REFLECTOR PORTION FOR RECOMBINATION OF A PORTION OF SAID RADIATION WITH THAT PORTION OF SAID RADIATION WHICH HAS BEEN ORIGINALLY REFLECTED BY SAID PARTIAL REFLECTOR.
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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) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |