US3038378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable focal length optical objective
Assignee: Bell and Howell Co
•
Filing: 1959-01-12
•
Granted: 1962-06-12
•
Expires: 1979-01-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas I Harris
- 👤 Walter J Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:29
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/14; G02B15/144; G02B15/1441; G02B15/144113
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR26896E
Cited
US2649025A
Cited
US2718817A
Cited
US2859654A
Cited
FR1123471A
Cited
FR1120271A
Cited
US2847907A
Cited
US2906172A
Cited
US2843016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-11 | 1965-12-11 | 1966-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-11 | 1969-12-11 | 1970-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-11 | 1973-12-11 | 1974-06-12 | $7700.00 | Window Closed / Lapsed |