US2745310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interferometer
Assignee: Ernst Leitz Wetzlar GmbH
•
Filing: 1953-01-29
•
Granted: 1956-05-15
•
Expires: 1973-01-29
Abstract
No abstract record available.
Inventors
- 👤 Horn Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:33
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/41; G01N21/45
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
AN INTERFEROMETER WITH A DIFFRACTION GRATING FOR PRODUCING COHERENT LIGHT BEAMS, EACH BEAM FORMING A GRATING SPECTRUM, COMPRISING OPTICAL REVERSING MEANS FOR REVERSING THE POSITION OF THE COLORS IN EACH SPECTRUM, AND OPTICAL MEANS FOR COMBINING THE BEAMS INTO AN INTERFERENCE BAND PATTERN IN A PLANE, THE COLORED RIMS OF THE INTERFERENCE BANDS BEING SO WIDENED THAT ALL EXCEPT THE TWO CENTER BANDS WHICH ARE ALMOST ACHROMATIC COMPLE-
Claim 2
Dependent Claim
68 words
AN INTERFEROMETER WITH A DIFFRACTION GRATING FOR PRODUCING COHERENT LIGHT BEAMS, EACH BEAM FORMING A GRATING SPECTRUM, COMPRISING OPTICAL REVERSING MEANS FOR REVERSING THE POSITION OF THE COLORS IN EACH SPECTRUM, AND OPTICAL MEANS FOR COMBINING THE BEAMS INTO AN INTERFERENCE BAND PATTERN IN A PLANE, THE COLORED RIMS OF THE INTERFERENCE BANDS BEING SO WIDENED THAT ALL EXCEPT THE TWO CENTER BANDS WHICH ARE ALMOST ACHROMATIC COMPLE-
References Cited (Backward Citations)
GB355911A
Cited
US2601175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |