Patent US1445252A successfully refreshed from Google Patents.
Patent US3283680A successfully refreshed from Google Patents.
US3283680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microxerographic reproduction apparatus
Assignee: Bell and Howell Co
•
Filing: 1964-03-26
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Granted: 1966-11-08
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Expires: 1984-03-26
Abstract
No abstract record available.
Inventors
- 👤 Louis A Smitzer
- 👤 Adolph J Gawin
- 👤 Maynard C Gross
- 👤 William E Bixby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:20
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
THE METHOD OF ELECTROSTATOGRAPHIC REPRODUCTION WHICH INCLUDES THE STEPS OF HOLDING A FLAT PHOTOCONDUCTIVE SURFACE STATIONARY DURING THE EXPOSING STEP TO PRODUCE A LATENT ELECTROSTATIC IMAGE ON THE SURFACE, AND ROTATABLY MOVING THE EXPOSED PHOTOCONDUCTIVE SURFACE ON AN AXIS OF ROTATION INTERSECTING THE SURFACE, AND SIMULTANEOUSLY DEVELOPING THE IMAGE BY FLOWING ACROSS SAID EXPOSED PHOTOCONDUCTIVE SURFACE
Claim 2
Independent Claim
56 words
THE METHOD OF ELECTROSTATOGRAPHIC REPRODUCTION WHICH INCLUDES THE STEPS OF HOLDING A FLAT PHOTOCONDUCTIVE SURFACE STATIONARY DURING THE EXPOSING STEP TO PRODUCE A LATENT ELECTROSTATIC IMAGE ON THE SURFACE, AND ROTATABLY MOVING THE EXPOSED PHOTOCONDUCTIVE SURFACE ON AN AXIS OF ROTATION INTERSECTING THE SURFACE, AND SIMULTANEOUSLY DEVELOPING THE IMAGE BY FLOWING ACROSS SAID EXPOSED PHOTOCONDUCTIVE SURFACE
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |