Patent US3308475A successfully refreshed from Google Patents.
US3308475A
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Electroviscously controlled recorder
Assignee: Xerox Corp
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Filing: 1964-12-21
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Granted: 1967-03-07
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Expires: 1984-12-21
Abstract
No abstract record available.
Inventors
- 👤 Lloyd F Bean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:04
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; G; G01; G01D; G01D15/00; G01D15/06; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
AN ELECTROVISCOUSLY CONTROLLED RECORDING INSTRUMENT COMPRISING: LIQUID CONTAINING MEANS FOR ELECTROVISCOUS LIQUID HAVING AN OPENING AT ONE END THEREOF FROM WHICH SAID LIQUID MAY FLOW, SAID OPENING BEING DEFINED BY SURFACES FORMED FOR FRICTIONALLY HOLDING AT LEAST ONE ROTATABLE WRITING BODY MOUNTED THEREIN; AT LEAST ONE PAIR OF ELECTRODES POSITIONED AT THE FORMED SURFACES; AND, CIRCUIT MEANS CONNECTED TO SAID ELECTRODES TO ESTABLISH AN ELECTRIC FIELD ACROSS SAID OPENING, SAID CIRCUIT MEANS INCLUDING MEANS TO SELECTIVELY CONTROL THE ESTABLISHMENT OF SAID ELECTRIC FIELD.
Claim 2
Dependent Claim
83 words
AN ELECTROVISCOUSLY CONTROLLED RECORDING INSTRUMENT COMPRISING: LIQUID CONTAINING MEANS FOR ELECTROVISCOUS LIQUID HAVING AN OPENING AT ONE END THEREOF FROM WHICH SAID LIQUID MAY FLOW, SAID OPENING BEING DEFINED BY SURFACES FORMED FOR FRICTIONALLY HOLDING AT LEAST ONE ROTATABLE WRITING BODY MOUNTED THEREIN; AT LEAST ONE PAIR OF ELECTRODES POSITIONED AT THE FORMED SURFACES; AND, CIRCUIT MEANS CONNECTED TO SAID ELECTRODES TO ESTABLISH AN ELECTRIC FIELD ACROSS SAID OPENING, SAID CIRCUIT MEANS INCLUDING MEANS TO SELECTIVELY CONTROL THE ESTABLISHMENT OF SAID ELECTRIC FIELD.
References Cited (Backward Citations)
US2925312A
Cited
US3270637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |