Patent US3128058A successfully refreshed from Google Patents.
US3128058A
Expired / Lapsed
US
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Plastic casing for photographic film spools having light-absorbing baffles
Assignee: EIDP Inc
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Filing: 1961-12-27
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Granted: 1964-04-07
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Expires: 1981-12-27
Abstract
No abstract record available.
Inventors
- 👤 Louis A Ringle
- 👤 Robert N Marona
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:54
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/28; G03B17/30; G03B2217/00; G03B2217/26; G03B2217/265
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
IN A LIGHTPROOF CASING FOR A SPOOL OF PHOTOGRAPHIC FILM HAVING LIPS PROVIDING AN ELONGATED SLOT FOR THE INGRESS AND EGRESS OF PHOTOGRAPHIC FILM, EACH OF SAID LIPS HAVING AN OUTER STRAIGHT PORTION AND AN INNER CURVED PORTION PROVIDING A CURVED INNER EXTENSION OF THE SLOT, SAID CURVED PORTION SERVING TO PREVENT LIGHT RAYS FROM PASSING INTO THE CASING BY HAVING THEREIN STEPS THAT CONSTITUTE LIGHT-ABSORBING BAFFLES, THE RISERS OF SAID STEPS BEING IN PLANES THAT ARE SUBSTANTIALLY PERPENDICULAR TO THE OUTER STRAIGHT PORTION AND THE TREADS BEING IN PLANES THAT ARE SUBSTANTIALLY PARALLEL TO SAID OUTER STRAIGHT PORTION.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |