US3775102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electrostatically copying information on both sides of an original onto both sides of a support material
Assignee: Xerox Corp
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Filing: 1971-09-03
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Granted: 1973-11-27
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Expires: 1991-09-03
Abstract
Abstract A method for duplex printing or reproducing the information from both sides of an original document upon a support material by simultaneously forming an electrostatic latent image conforming to each side of the original document on respective photoconductive plates, developing the plates and transferring the developed images from the plates onto opposite sides of the support material.
Inventors
- 👤 F Punnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:00
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/23; G03G15/231; G03G15/238; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
The method of printing the information on two sides of an original respectively onto two sides of support material including the steps of forming a first electrostatic latent image on a photoconductive surface of the information on one side of the original, developing the first latent image and transferring the developed image onto one side of the support material, forming a second electrostatic latent image on another photoconductive surface of the information on the other side of the original simultaneously with the formation on said first latent image, and developing the second latent image and transferring the developed image onto the other side of the support material.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |