US3544191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical fiber focusing device for optical instruments
Assignee: International Business Machines Corp
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Filing: 1968-11-21
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Granted: 1970-12-01
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Expires: 1988-11-21
Abstract
No abstract record available.
Inventors
- 👤 Hans R Rottmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:27
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/28; G02B7/36; G02B21/00; G02B21/24; G02B21/241; G02B6/00; G02B6/04; G02B6/06; G02B6/08; G02B7/02; G02B7/04
Claims Analysis
Total Claims: 0
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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) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |