US3132821A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera spool with core ejection fixture
Assignee: 3M Co
•
Filing: 1961-01-19
•
Granted: 1964-05-12
•
Expires: 1981-01-19
Abstract
No abstract record available.
Inventors
- 👤 Robert B Herden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:15
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/321; G03B21/326; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7005; Y10T403/7007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1232193A
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US1479253A
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US1509441A
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US1578874A
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FR637614A
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US2127772A
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US2811985A
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DE939306C
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FR1162574A
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US2986357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |