US3434771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gyroscopic lens
Assignee: Bell and Howell Co
•
Filing: 1966-05-11
•
Granted: 1969-03-25
•
Expires: 1986-05-11
Abstract
No abstract record available.
Inventors
- 👤 Luis W Alvarez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:23
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/64; G02B27/646; G02B27/644
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB784693A
Cited
US2948813A
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GB790019A
Cited
US2921496A
Cited
US2959088A
Cited
US3084443A
Cited
US3030857A
Cited
US3283408A
Cited
US3378326A
Cited
DE1242003B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |