US3409799A
Expired / Lapsed
US
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Automatic focusing system for beam devices
Assignee: International Business Machines Corp
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Filing: 1966-08-29
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Granted: 1968-11-05
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Expires: 1986-08-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Fred Kurzweil
- 👤 Robert R Barber
- 👤 Martin H Dost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:03
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/08; G11B7/09; G11B7/0908; G11B7/0917; G11B9/00; G11B9/10; G11C; G11C13/00; G11C13/04; G11C13/048; H; H01; H01J; H01J29/00; H01J29/46; H01J29/52; H01J29/58; H01J29/64; H01J29/66; H01J29/82; H01J37/00; H01J37/02; H01J37/04; H01J37/09; H01J37/21; H01J37/244; H01J37/30; H01J37/304; H01J2237/00; H01J2237/244; H01J2237/2446; H01J2237/245; H01J2237/24507; H01J2237/24571; H01J2237/24578
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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |