US3134849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for sequentially depositing toner powder
Assignee: Metromedia Inc
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Filing: 1961-08-09
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Granted: 1964-05-26
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Expires: 1981-08-09
Abstract
No abstract record available.
Inventors
- 👤 Hugh F Frohbach
- 👤 Earle D Jones
- 👤 Jr Philip J Rice
- 👤 Loren G Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:36
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/22; G03G15/34; G03G15/344; G03G15/346; H; H04; H04N; H04N1/00; H04N1/024; H04N1/032; H04N1/46; H04N1/50; H04N1/502; Y; Y10; Y10S; Y10S101/00; Y10S101/37; Y10S222/00; Y10S222/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
AN ELECTROSTATIC-WRITING TRANSDUCER COMPRISING A CONTAINER FOR PIGMENT POWDER, SAID CONTAINER HAVING CONDUCTIVE WALLS AND HAVING ONE OPENING THROUGH WHICH PIGMENT POWDER CAN BE INTRODUCED INTO SAID CONTAINER AND A SECOND OPENING FOR REMOVING PIGMENT POWDER FROM SAID CONTAINER, SAID SECOND OPENING BEING SUFFICIENTLY SMALL TO PREVENT PASSAGE OF PIGMENT POWDER UNLESS SAID CONTAINER IS VIBRATED, AND MEANS CONNECTED TO SAID CONTAINER FOR CONTRLLABLY VIBRATING SAID CONTAINER AT VARIOUS PREDETERMINED AMPLITUDES TO VARY THE AMOUNT OF POWDER PASSING THROUGH SAID SECOND OPENING ACCORDINGLY.
Claim 2
Dependent Claim
83 words
AN ELECTROSTATIC-WRITING TRANSDUCER COMPRISING A CONTAINER FOR PIGMENT POWDER, SAID CONTAINER HAVING CONDUCTIVE WALLS AND HAVING ONE OPENING THROUGH WHICH PIGMENT POWDER CAN BE INTRODUCED INTO SAID CONTAINER AND A SECOND OPENING FOR REMOVING PIGMENT POWDER FROM SAID CONTAINER, SAID SECOND OPENING BEING SUFFICIENTLY SMALL TO PREVENT PASSAGE OF PIGMENT POWDER UNLESS SAID CONTAINER IS VIBRATED, AND MEANS CONNECTED TO SAID CONTAINER FOR CONTRLLABLY VIBRATING SAID CONTAINER AT VARIOUS PREDETERMINED AMPLITUDES TO VARY THE AMOUNT OF POWDER PASSING THROUGH SAID SECOND OPENING ACCORDINGLY.
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) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |