Patent US2584208A successfully refreshed from Google Patents.
Patent US3357403A successfully refreshed from Google Patents.
US3357403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder cloud development apparatus
Assignee: Xerox Corp
•
Filing: 1967-01-03
•
Granted: 1967-12-12
•
Expires: 1987-01-03
Abstract
No abstract record available.
Inventors
- 👤 Daniel J Donalies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:56
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0803
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN A XEROGRPHIC DEVELOPMENT SYSTEM OF THE TYPE WHEREIN A POWDER CLOUD OF CHARGED TONER PARTICLES IS USED TO DEVELOP LATENT ELECTROSTATIC IMAGES, APPARATUS TO REMOVE FROM THE POWDER CLOUD THOSE TONER PARTICLES OF AN UNDESIRED POLARITY, INCLUDING, MEANS TO CREATE AN ELECTRIC FIELD ADAPTED TO ATTRACT AND RETAIN TONER PARTICLES OF A LIKE POLARITY FROM A POWDER CLOUD, THE FIELD CREATING MEANS INCLUDING A FIRST CONDUCTIVE ELECTRODE MEMBER AND A SECOND CONDUCTIVE ELECTRODE MEMBER LOCATED REMOTE FROM THE FIELD OF THE LATENT ELECTROSTATIC IMAGES TO BE DEVELOPED, MEANS TO HOLD THE FIRST AND SECOND CONDUTIVE ELECTRODE MEMBERS SPACED AND ELECTRICALLY INSULATED FROM EACH OTHER AND IMPELLING MEANS OPERATIVELY POSITIONED TO MOVE A CLOUD OF CHARGED TONER PARTICLES FROM A TONER SUPPLY TO A XEROGRAPHIC DEVELOPMENT ZONE THROUGH THE FIELD CREATING MEANS TO THEREBY EFFECT THE REMOVAL OF TONER PARTICLES OF THE UNDESIRED POLARITY FROM THE CLOUD.
Claim 2
Dependent Claim
147 words
IN A XEROGRPHIC DEVELOPMENT SYSTEM OF THE TYPE WHEREIN A POWDER CLOUD OF CHARGED TONER PARTICLES IS USED TO DEVELOP LATENT ELECTROSTATIC IMAGES, APPARATUS TO REMOVE FROM THE POWDER CLOUD THOSE TONER PARTICLES OF AN UNDESIRED POLARITY, INCLUDING, MEANS TO CREATE AN ELECTRIC FIELD ADAPTED TO ATTRACT AND RETAIN TONER PARTICLES OF A LIKE POLARITY FROM A POWDER CLOUD, THE FIELD CREATING MEANS INCLUDING A FIRST CONDUCTIVE ELECTRODE MEMBER AND A SECOND CONDUCTIVE ELECTRODE MEMBER LOCATED REMOTE FROM THE FIELD OF THE LATENT ELECTROSTATIC IMAGES TO BE DEVELOPED, MEANS TO HOLD THE FIRST AND SECOND CONDUTIVE ELECTRODE MEMBERS SPACED AND ELECTRICALLY INSULATED FROM EACH OTHER AND IMPELLING MEANS OPERATIVELY POSITIONED TO MOVE A CLOUD OF CHARGED TONER PARTICLES FROM A TONER SUPPLY TO A XEROGRAPHIC DEVELOPMENT ZONE THROUGH THE FIELD CREATING MEANS TO THEREBY EFFECT THE REMOVAL OF TONER PARTICLES OF THE UNDESIRED POLARITY FROM THE CLOUD.
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) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |