Patent US2619418A successfully refreshed from Google Patents.
US2619418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic plate holder
Assignee: Xerox Corp
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Filing: 1950-12-30
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Granted: 1952-11-25
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Expires: 1970-12-30
Abstract
No abstract record available.
Inventors
- 👤 Clyde R Mayo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:59
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/75; G03G15/758
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
AN ELECTROPHOTOGRAPHIC MEMBER OF IMPROVED RESISTANCE TO DAMAGE COMPRISING AN ELECTROPHOTOGRAPHIC PLATE HAVING A SHEET METALLIC BACKING AND A VITREOUS SELENIUM COATING THEREON AND A FRAME ENGAGING AND SURROUNDING SAID PLATE, A SLOT AT ONE END OF THE FRAME AND COMMUNICATING GROOVES TO RECEIVE A LIGHT SHEILD THROUGH SAID SLOT ABOVE THE SELENIUM COATED SURFACE OF THE PLATE, A REAR FRAME MEMBER AT THE END OPPOSITE THE SLOT TO RECEIVE IN ABUTMENT THE END OF THE SHIELD WHEN FULLY INSERTED THROUGH THE SLOT, THE INSIDE FACES OF THE SIDE FRAME MEMBER HAVING SHOULDERS BETWEEN THE PLATE AND THE GROOVES AND ADJACENT TO THE PLATE, EXTENDING FURTHER INWARDLY THAN THE FACES ABOVE THE GROOVES, WHEREBY PARTICLES STRIKING SAID SHOULDERS ARE DIRECTED AWAY FROM THE OPENINGS OF THE GROOVE.
Claim 2
Dependent Claim
127 words
AN ELECTROPHOTOGRAPHIC MEMBER OF IMPROVED RESISTANCE TO DAMAGE COMPRISING AN ELECTROPHOTOGRAPHIC PLATE HAVING A SHEET METALLIC BACKING AND A VITREOUS SELENIUM COATING THEREON AND A FRAME ENGAGING AND SURROUNDING SAID PLATE, A SLOT AT ONE END OF THE FRAME AND COMMUNICATING GROOVES TO RECEIVE A LIGHT SHEILD THROUGH SAID SLOT ABOVE THE SELENIUM COATED SURFACE OF THE PLATE, A REAR FRAME MEMBER AT THE END OPPOSITE THE SLOT TO RECEIVE IN ABUTMENT THE END OF THE SHIELD WHEN FULLY INSERTED THROUGH THE SLOT, THE INSIDE FACES OF THE SIDE FRAME MEMBER HAVING SHOULDERS BETWEEN THE PLATE AND THE GROOVES AND ADJACENT TO THE PLATE, EXTENDING FURTHER INWARDLY THAN THE FACES ABOVE THE GROOVES, WHEREBY PARTICLES STRIKING SAID SHOULDERS ARE DIRECTED AWAY FROM THE OPENINGS OF THE GROOVE.
References Cited (Backward Citations)
US725898A
Cited
US1109873A
Cited
US1134540A
Cited
US1788905A
Cited
US2277013A
Cited
US2588675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-25 | 1956-05-26 | 1956-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-25 | 1960-05-26 | 1960-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-25 | 1964-05-26 | 1964-11-25 | $7700.00 | Window Closed / Lapsed |