US3442585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous rotary electrostatographic apparatus
Assignee: Bell and Howell Co
•
Filing: 1965-10-23
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Granted: 1969-05-06
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Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Louis A Smitzer
- 👤 Len A Tyler
- 👤 Walter Hines
- 👤 William E Bixby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:47
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28; G03G15/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
ELECTROSTATOGRAPHIC APPARATUS COMPRISING A ROTATABLE DRUM HAVING RADIAL SIDE WALLS IN SPACED PARALLEL RELATIONSHIP AND A CIRCUMFERENTIALLY CONTINUOUS PERIPHERAL SURFACE OF PHOTOCONDUCTIVE MATERIAL ON SAID DRUM, SAID DRUM HAVING A SEALING DISK ON EACH SAID RADIAL SIDE WALL MADE OF INSULATOR MATERIAL TO PREVENT
Claim 2
Dependent Claim
44 words
ELECTROSTATOGRAPHIC APPARATUS COMPRISING A ROTATABLE DRUM HAVING RADIAL SIDE WALLS IN SPACED PARALLEL RELATIONSHIP AND A CIRCUMFERENTIALLY CONTINUOUS PERIPHERAL SURFACE OF PHOTOCONDUCTIVE MATERIAL ON SAID DRUM, SAID DRUM HAVING A SEALING DISK ON EACH SAID RADIAL SIDE WALL MADE OF INSULATOR MATERIAL TO PREVENT
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-05 | 1972-11-04 | 1973-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-05 | 1976-11-04 | 1977-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-05 | 1980-11-04 | 1981-05-06 | $7700.00 | Window Closed / Lapsed |