US2968994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic focusing devices and systems
Assignee: Polaroid Corp
•
Filing: 1956-04-23
•
Granted: 1961-01-24
•
Expires: 1976-04-23
Abstract
No abstract record available.
Inventors
- 👤 William A Shurcliff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:10
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/24; G02B21/241
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1866581A
Cited
US2164576A
Cited
US2254548A
Cited
US2339780A
Cited
US2524807A
Cited
GB719700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |