Patent US2809294A successfully refreshed from Google Patents.
US2809294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xeroradiographic plates or elements
Assignee: Xerox Corp
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Filing: 1954-12-23
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Granted: 1957-10-08
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Expires: 1974-12-23
Abstract
No abstract record available.
Inventors
- 👤 Robert G Vyverberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:15
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G5/144
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
A XERORADIOGRAPHIC ELEMENT COMPRISING IN A UNITARY STRUCTURE A RIGID SUPPORT LAYER, A METAL INTENSIFYING LAYER OF HIGH ATOMIC NUMBER OVERLYING SAID SUPPORT LAYER, A FILMLIKE INTERFACE LAYER HAVING A THICKNESS OF APPROXIFYING LAYER, AND A LAYER OF PHOTOCONDUCTIVE INSULATING MATERIAL OVERLYING SAID INTERFACE LAYER, SAID INTERFACE LAYER BEING OF A MATERIAL WHICH FACILITATES THE DEPOSITION OF A UNIFORM LAYER OF PHOTOCONDUCTIVE INSULATING MATERIAL THEREON.
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) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |