US3129115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xerographic developing apparatus
Assignee: Xerox Corp
•
Filing: 1961-04-17
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Granted: 1964-04-14
•
Expires: 1981-04-17
Abstract
No abstract record available.
Inventors
- 👤 Harold E Clark
- 👤 Robert W Gundlach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:15
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/104
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
APPARATUS COMPRISING IN COMBINATION MEANS TO SUPPORT A XEROGRAPHIC PLATE, AT LEAST TWO RESERVOIRS FOR CONTAINMENT OF A LIQUID OF HIGH ELECTRICAL RESISTANCE IN WHICH ELECTROSCOPIC DEVELOPING MATERIAL CAN BE CONTAINED, MEANS TO SELECTIVELY CONTACT A XEROGRAPHIC PLATE ON ITS SUPPORT MEANS WITH A QUANTITY OF LIQUID CONTAINED IN EACH OF SAID RESERVOIRS AND RETURN AN EXCESS OF SAID LIQUID QUANTITY THROUGH A COMMON RETURN TO THE RESERVOIRS, AND DEVELOPING MATERIAL SEPARATING MEANS CONNECTED IN THE COMMON RETURN TO SAID RESERVOIRS TO MAINTAIN THE LIQUID IN AT LEAST ONE OF SAID RESERVOIRS WITH A HIGH CONCENTRATION OF DEVELOPING MATERIAL ADAPTED TO EFFECT DEVELOPMENT OF AN ELECTROSTATIC LATENT IMAGE ON A XEROGRAPHIC PLATE BY DEPOSITING DEVELOPING MATERIAL THEREON WHILE MAINTAINING THE LIQUID IN ANOTHER OF SAID RESERVOIRS WITH A SUBSTANTIALLY LOWER CONCENTRATION OF DEVELOPING MATERIAL ADAPTED TO REMOVE DEVELOPER DEPOSITED ON A PLATE BY THE HIGHLY CONCENTRATED LIQUID.
Claim 2
Dependent Claim
147 words
APPARATUS COMPRISING IN COMBINATION MEANS TO SUPPORT A XEROGRAPHIC PLATE, AT LEAST TWO RESERVOIRS FOR CONTAINMENT OF A LIQUID OF HIGH ELECTRICAL RESISTANCE IN WHICH ELECTROSCOPIC DEVELOPING MATERIAL CAN BE CONTAINED, MEANS TO SELECTIVELY CONTACT A XEROGRAPHIC PLATE ON ITS SUPPORT MEANS WITH A QUANTITY OF LIQUID CONTAINED IN EACH OF SAID RESERVOIRS AND RETURN AN EXCESS OF SAID LIQUID QUANTITY THROUGH A COMMON RETURN TO THE RESERVOIRS, AND DEVELOPING MATERIAL SEPARATING MEANS CONNECTED IN THE COMMON RETURN TO SAID RESERVOIRS TO MAINTAIN THE LIQUID IN AT LEAST ONE OF SAID RESERVOIRS WITH A HIGH CONCENTRATION OF DEVELOPING MATERIAL ADAPTED TO EFFECT DEVELOPMENT OF AN ELECTROSTATIC LATENT IMAGE ON A XEROGRAPHIC PLATE BY DEPOSITING DEVELOPING MATERIAL THEREON WHILE MAINTAINING THE LIQUID IN ANOTHER OF SAID RESERVOIRS WITH A SUBSTANTIALLY LOWER CONCENTRATION OF DEVELOPING MATERIAL ADAPTED TO REMOVE DEVELOPER DEPOSITED ON A PLATE BY THE HIGHLY CONCENTRATED LIQUID.
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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) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |