US3511552A
Expired / Lapsed
US
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Optical interference microscopy
Assignee: American Optical Corp
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Filing: 1966-08-30
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Granted: 1970-05-12
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Expires: 1986-08-30
Abstract
No abstract record available.
Inventors
- 👤 Harold Osterberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:23
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/06; G01; G01B; G01B9/00; G01B9/02; G01B9/02015; G01B9/02024; G01B9/021; G01B9/04; G03; G03H; G03H1/00; G03H1/04; G03H1/0465; H; H01; H01S; H01S3/00; H01S3/0007; H01S3/05; H01S3/08; G03H1/0402; G03H1/0404; G03H1/0406; G03H1/041; G03H1/0005; G03H2001/005; G03H1/02; G03H2001/0208; G03H2001/0212; G03H2222/00; G03H2222/10; G03H2222/12; G03H2223/00; G03H2223/18
Claims Analysis
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |