Patent US4484550A successfully refreshed from Google Patents.
Patent US4132465A successfully refreshed from Google Patents.
US4132465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochrome element control device
Assignee: Latviisky Gosudarstvenny Universitet Imeni P Stuchki
•
Filing: 1976-12-17
•
Granted: 1979-01-02
•
Expires: 1996-12-17
Abstract
Abstract An electrochrome element control device comprising a voltage source connected in parallel via a switch with a circuit composed of a series-connected electrochrome element and a capacitor for limiting the time the voltage is supplied to the electrochrome element, the charged capacitor supplies voltage of opposite polarity to the electrochrome element upon closure of a second switch connected in parallel to the circuit composed of the electrochrome element and the capacitor. Control of the electrochrome element is considerably simplified therefore.
Inventors
- 👤 Oyars A. Rode
- 👤 Andrei R. Lusis
- 👤 Yanis K. Klyavin
- 👤 Talivaldis V. Zamozdik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:42
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/163
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
149 words
An electrochrome element control device comprising: an electrochrome element having two electrodes; a single d-c voltage source having two poles; a switch connected in series between one of the poles of said voltage source and one electrode of said electrochrome element for the supply of the voltage of one polarity to said electrochrome element; a capacitor connected in series between the other electrode of said electrochrome element and the other pole of said voltage source for limiting the time of voltage supply to said element, as well as to accummulate the charge; and a second switch connected in parallel to the circuit composed of said electrochrome element and the capacitor for closing said circuit when said first switch is opened for the discharge of said accummulated charge of the capacitor through said second switch and said electrochrome element as a voltage of the other polarity to said electrochrome element.
Claim 2
Dependent Claim
149 words
An electrochrome element control device comprising: an electrochrome element having two electrodes; a single d-c voltage source having two poles; a switch connected in series between one of the poles of said voltage source and one electrode of said electrochrome element for the supply of the voltage of one polarity to said electrochrome element; a capacitor connected in series between the other electrode of said electrochrome element and the other pole of said voltage source for limiting the time of voltage supply to said element, as well as to accummulate the charge; and a second switch connected in parallel to the circuit composed of said electrochrome element and the capacitor for closing said circuit when said first switch is opened for the discharge of said accummulated charge of the capacitor through said second switch and said electrochrome element as a voltage of the other polarity to said electrochrome element.
Claim 3
Dependent Claim
18 words
A device as claimed in claim 1, in which one of said switches is constituted as a resistor.
References Cited (Backward Citations)
US3932773A
Cited
US3980899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |