US3554631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grooved object slide for interference microscope
Assignee: Jenoptik AG
•
Filing: 1968-01-22
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Granted: 1971-01-12
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Expires: 1988-01-22
Abstract
Abstract AN OBJECT SLIDE, PARTICULARLY FOR INTERFERENCE MICROSCOPES, IS PROVIDED WITH A GROOVE. THE GROOVE IS BROADER AT THE SURFACE OF THE SLIDE THAN IT IS AT ITS BOTTOM. A MARK ON THE SURFACE OF THE SLIDE IS IN CLOSE VICINITY TO THE GROOVE.
Inventors
- 👤 Hermann Beyer
- 👤 Gunter Schoppe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:44
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |