Patent US1013128A successfully refreshed from Google Patents.
Patent US3620893A successfully refreshed from Google Patents.
US3620893A
Expired / Lapsed
US
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Film end construction for self threading device
Assignee: Bell and Howell Co
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Filing: 1969-11-04
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Granted: 1971-11-16
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Expires: 1989-11-04
Abstract
Abstract A novel film end construction for facilitating the selfthreading of a film handling device.
Inventors
- 👤 Irvin S Tarrson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:00
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/56; G03D; G03D15/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24314
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
The article set forth in claim 1 wherein said widened portion comprises two tabs opposite one another extending from the edges of said film.
Claim 2
Dependent Claim
19 words
The article set forth in claim 2 wherein said tabs are substantially trapezoidal and said cutout is substantially rectangular.
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |