Patent US3325973A successfully refreshed from Google Patents.
Patent US3190177A successfully refreshed from Google Patents.
US3190177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical shutters
Assignee: Individual
•
Filing: 1958-04-15
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Granted: 1965-06-22
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Expires: 1978-04-15
Abstract
No abstract record available.
Inventors
- 👤 Edward K Kaprelian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:30
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A LIGHT SHUTTLER COMPRISING A FIRST TRANSPARENT ELECTRODE, A SECOND TRANSPARENT ELECTRODE PARALLEL TO, COEXTENSIVE WITH, AND SPACED APART FROM SAID FIRST ELECTRODE, AN INSULATING FRAME RECEIVING THE EDGES OF SAID ELECTRODES AND RETAINING SAME TO FORM THEREBETWEEN A SEALED ELECTROLYTE RETAINING CELL, AN ELECTROLYTIC PLATING BATH IN SAID CELL, A PLATED, NON-LIGHT-TRANSMITTING METAL LAYER ON THE SURFACE OF SAID FIRST TRANSPARENT ELECTRODE, AND A SOURCE OF ELECTRICAL POWER CONNECTABLE TO SAID ELECTRODES FOR SUCCESSIVELY UNPLATING SAID METAL LAYER FROM SAID FIRST ELECTRODE AND PLATING A NON-LIGHT-TRANSMITTING METAL LAYER ON SAID SECOND ELECTRODE IN A SINGLE CONTINUOUS ACTION, SAID SOURCE INCLUDING SWITCHING MEANS FOR REVERSING THE POLARITY OF THE POWER CONNECTED TO SAID ELECTRODES.
Claim 2
Dependent Claim
114 words
A LIGHT SHUTTLER COMPRISING A FIRST TRANSPARENT ELECTRODE, A SECOND TRANSPARENT ELECTRODE PARALLEL TO, COEXTENSIVE WITH, AND SPACED APART FROM SAID FIRST ELECTRODE, AN INSULATING FRAME RECEIVING THE EDGES OF SAID ELECTRODES AND RETAINING SAME TO FORM THEREBETWEEN A SEALED ELECTROLYTE RETAINING CELL, AN ELECTROLYTIC PLATING BATH IN SAID CELL, A PLATED, NON-LIGHT-TRANSMITTING METAL LAYER ON THE SURFACE OF SAID FIRST TRANSPARENT ELECTRODE, AND A SOURCE OF ELECTRICAL POWER CONNECTABLE TO SAID ELECTRODES FOR SUCCESSIVELY UNPLATING SAID METAL LAYER FROM SAID FIRST ELECTRODE AND PLATING A NON-LIGHT-TRANSMITTING METAL LAYER ON SAID SECOND ELECTRODE IN A SINGLE CONTINUOUS ACTION, SAID SOURCE INCLUDING SWITCHING MEANS FOR REVERSING THE POLARITY OF THE POWER CONNECTED TO SAID ELECTRODES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |