Patent US3375754A successfully refreshed from Google Patents.
US3375754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens testing autocollimator
Assignee: Bausch and Lomb Inc
•
Filing: 1964-09-29
•
Granted: 1968-04-02
•
Expires: 1984-09-29
Abstract
No abstract record available.
Inventors
- 👤 Kenneth G Kugler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:09
CPC Classifications
G; G01; G01M; G01M11/00; G01M11/02; G01M11/0228
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
131 words
AN AUTOCOLLIMATOR FOR PRECISION MEASURING OF FOCAL LENGTH AND NODAL POINT DECENTRATION OF A NEGATIVE LENS, SAID AUTOCOLLIMATOR COMPRISING A COLLIMATING LENS, A SPHERICALLY CONCAVE MIRROR FACING SAID LENS AND SPACED THEREFROM IN OPTICAL ALIGNMENT THEREWITH, INDICIA MEANS OPTICALLY ALIGNED WITH SAID LENS ON THE SIDE OPPOSITE TO THE MIRROR AND SPACED FROM THE LENS AT AN AXIAL PATH LENGTH EQUAL TO THE FRONT FOCAL LENGTH OF THE LENS, A LIGHT TRANSMITTING PLATE ON WHICH SAID INDICIA MEANS IS FORMED, MEANS FOR TRANSILLUMINATING SAID INDICIA MEANS, A NODAL SLIDE FOR SUPPORTING SAID NEGATIVE LENS WITH ITS RELEVANT NODAL POINT SO SPACED FROM THE VERTEX OF SAID MIRROR THAT THE INCIDENT IMAGE RAYS PROJECTED FROM SAID INDICIA MEANS ARE RETRODIRECTED BY SAID MIRROR TO THE FRONT FOCAL POINT OF THE COLLIMATING LENS,
References Cited (Backward Citations)
US2254548A
Cited
US2478609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-02 | 1971-10-02 | 1972-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-02 | 1975-10-02 | 1976-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-02 | 1979-10-02 | 1980-04-02 | $7700.00 | Window Closed / Lapsed |