US3077386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating selenium
Assignee: Xerox Corp
•
Filing: 1958-01-02
•
Granted: 1963-02-12
•
Expires: 1978-01-02
Abstract
No abstract record available.
Inventors
- 👤 Robert M Blakney
- 👤 John B Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:39
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08207; C; C01; C01B; C01B19/00; C01B19/02; G03G5/005; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84; C01P2006/00; C01P2006/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A PROCESS OF TREATING SUBSTANTIALLY PURE SELENIUM TO REDUCE THE LIGHT FATIGUE AND DARK DECAY OF XEROGRAPHIC PLATES PREPARED THEREFROM COMPRISING: CONTACTING SAID SELENIUM WHILE HEATED AT LEAST ABOVE THE MELTING POINT THEREOF AND IN THE ABSENCE OF OXYGEN WITH AT LEAST ABOUT 2% OF ADDITIONAL MATERIAL AND SEPARATING SAID ADDITIONAL MATERIAL FROM SAID SELENIUM, SAID ADDITIONAL MATERIAL BEING STABLED AND NON-VOLATILE AT LEAST AT THE MELTING POINT OF SELENIUM, SAID ADDITIONAL MATERIAL BEING ADAPTED TO REACT WITH OXYGEN TO FORM A PRODUCT NON-VOLATILE AT LEAST AT THE MELTING POINT OF SELENIUM, SAID ADDITIONAL MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF IRON, CHROMIUM FERROUS SULFIDE, TITANIUM, ALUMINUM, NICKEL, AND ALLOYS AND MIXTURES THEREOF, SAID ADDITIONAL MATERIAL HAVING A SURFACE SUBSTANTIALLY FREE FROM PRIOR CONTACT WITH SELENIUM, SAID ADDITIONAL MATERIAL BEING PRESENT IN AN AMOUNT SUFFICIENT TO REDUCE THE LIGHT FATIGUE AND DARK DECAY OF A XEROGRAPHIC PLATE PREPARED FROM SAID SELENIUM
Claim 2
Dependent Claim
152 words
A PROCESS OF TREATING SUBSTANTIALLY PURE SELENIUM TO REDUCE THE LIGHT FATIGUE AND DARK DECAY OF XEROGRAPHIC PLATES PREPARED THEREFROM COMPRISING: CONTACTING SAID SELENIUM WHILE HEATED AT LEAST ABOVE THE MELTING POINT THEREOF AND IN THE ABSENCE OF OXYGEN WITH AT LEAST ABOUT 2% OF ADDITIONAL MATERIAL AND SEPARATING SAID ADDITIONAL MATERIAL FROM SAID SELENIUM, SAID ADDITIONAL MATERIAL BEING STABLED AND NON-VOLATILE AT LEAST AT THE MELTING POINT OF SELENIUM, SAID ADDITIONAL MATERIAL BEING ADAPTED TO REACT WITH OXYGEN TO FORM A PRODUCT NON-VOLATILE AT LEAST AT THE MELTING POINT OF SELENIUM, SAID ADDITIONAL MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF IRON, CHROMIUM FERROUS SULFIDE, TITANIUM, ALUMINUM, NICKEL, AND ALLOYS AND MIXTURES THEREOF, SAID ADDITIONAL MATERIAL HAVING A SURFACE SUBSTANTIALLY FREE FROM PRIOR CONTACT WITH SELENIUM, SAID ADDITIONAL MATERIAL BEING PRESENT IN AN AMOUNT SUFFICIENT TO REDUCE THE LIGHT FATIGUE AND DARK DECAY OF A XEROGRAPHIC PLATE PREPARED FROM SAID SELENIUM
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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) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |