USRE28360E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophoretic color display device
Assignee: —
•
Filing: 1973-09-06
•
Granted: 1975-03-04
•
Expires: 1993-09-06
Abstract
Abstract 1. A VISUAL DISPLAY DEVICE COMPRISING: AN (A) (COLORLESS) INSULATING FLUID CONTAINING PARTICLES OF AT LEAST ONE COLOR PIGMENT IN SUSPENSION, A SUBSTANTIAL AMOUNT OF SAID PARTICLES HAVING A CHARGE OF ONE POLARITY; FIRST ELECTRODES; SECOND ELECTRODES SPACED FROM SAID FIRST ELECTRODES, SAID FLUID DISPOSED BETWEEN AND SAID FIRST AND SECOND ELECTRODES; AND MEANS FOR SELECTIVELY APPLYING AN ELECTRICAL FIELD ACROSS INDIVIDUAL ONES OF SAID FIRST AND SECOND ELECTRODES WHEREBY SAID PARTICLES MIGRATE TO THE ELECTRODES HAVING A POLARITY OPPOSITE TO THIER OWN CAUSING A COLOR IMAGE TO BE FORMED ON SAID ELECTRODES.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:08
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/3433; G09G3/344; G02; G02F; G02F1/00; G02F1/01; G02F1/165; G02F1/166; G02F1/167; G09G2300/00; G09G2300/06; G09G2310/00; G09G2310/02; G09G3/2007; G09G3/2011
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A VISUAL DISPLAY DEVICE COMPRISING: AN (A) (COLORLESS) INSULATING FLUID CONTAINING PARTICLES OF AT LEAST ONE COLOR PIGMENT IN SUSPENSION, A SUBSTANTIAL AMOUNT OF SAID PARTICLES HAVING A CHARGE OF ONE POLARITY; FIRST ELECTRODES; SECOND ELECTRODES SPACED FROM SAID FIRST ELECTRODES, SAID FLUID DISPOSED BETWEEN AND SAID FIRST AND SECOND ELECTRODES; AND MEANS FOR SELECTIVELY APPLYING AN ELECTRICAL FIELD ACROSS INDIVIDUAL ONES OF SAID FIRST AND SECOND ELECTRODES WHEREBY SAID PARTICLES MIGRATE TO THE ELECTRODES HAVING A POLARITY OPPOSITE TO THIER OWN CAUSING A COLOR IMAGE TO BE FORMED ON SAID ELECTRODES.
Claim 2
Dependent Claim
92 words
A VISUAL DISPLAY DEVICE COMPRISING: AN (A) (COLORLESS) INSULATING FLUID CONTAINING PARTICLES OF AT LEAST ONE COLOR PIGMENT IN SUSPENSION, A SUBSTANTIAL AMOUNT OF SAID PARTICLES HAVING A CHARGE OF ONE POLARITY; FIRST ELECTRODES; SECOND ELECTRODES SPACED FROM SAID FIRST ELECTRODES, SAID FLUID DISPOSED BETWEEN AND SAID FIRST AND SECOND ELECTRODES; AND MEANS FOR SELECTIVELY APPLYING AN ELECTRICAL FIELD ACROSS INDIVIDUAL ONES OF SAID FIRST AND SECOND ELECTRODES WHEREBY SAID PARTICLES MIGRATE TO THE ELECTRODES HAVING A POLARITY OPPOSITE TO THIER OWN CAUSING A COLOR IMAGE TO BE FORMED ON SAID ELECTRODES.
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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |