US3424522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized optical system
Assignee: Bell and Howell Co
•
Filing: 1965-07-29
•
Granted: 1969-01-28
•
Expires: 1985-07-29
Abstract
No abstract record available.
Inventors
- 👤 Daniel Dale Call
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:18
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/64; G02B27/646; G03; G03B; G03B19/00; G03B19/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1586070A
Cited
US3035477A
Cited
US2769367A
Cited
US2709922A
Cited
US2817995A
Cited
US2951377A
Cited
US3302543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |