Patent US3522764A successfully refreshed from Google Patents.
US3522764A
Expired / Lapsed
US
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Rangefinding and focusing system for photographic cameras and the like
Assignee: Polaroid Corp
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Filing: 1968-03-25
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Granted: 1970-08-04
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Expires: 1988-03-25
Abstract
No abstract record available.
Inventors
- 👤 Conrad H Biber
- 👤 William R Pope Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:49
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/28; G02B7/40; G01; G01S; G01S15/00; G01S15/02; G01S15/06; G01S15/08; G01S15/10; G01S15/101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |