US3210549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-feedback electro-optical device
Assignee: US Philips Corp
•
Filing: 1961-11-14
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Granted: 1965-10-05
•
Expires: 1981-11-14
Abstract
No abstract record available.
Inventors
- 👤 Johannes Gerrit Van Santen
- 👤 Diemer Gesinus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:53
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/04; H03F3/08; H10; H10F; H10F55/00; H10F55/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
AN ELECTRO-OPTICAL DEVICE COMPRISING A FIRST RADIATION-RESPONSIVE VARIABLE-IMPEDANCE ELEMENT FOR RECEIVING INPUT RADIATION, A FIRST VOLTAGE-RESPONSIVE RADIATION ELEMENT OPTICALLY COUPLED TO THE FIRST VARIABLE-IMPEDANCE ELEMENT AND PROVIDING OPTICAL FEEDBACK, A SECOND VOLTAGERESPONSIVE RADIATION ELEMENT OPTICALLY SHIELDED FROM THE FIRST VARIABLE-IMPEDANCE ELEMENT FOR PORDUCING OUTPUT RADIATION, A MAIN SOURCE OF POTENTIAL, MEANS CONNECTING THE MAIN POTENTIAL SOURCE TO THE FIRST VARIABLE-IMPEDANCE ELEMENT AND THE FIRST AND SECOND RADIATION ELEMENTS IN A STAR-CONNECTED CIRCUIT AT WHICH THE SAID ELEMENTS ARE CONNECTED TO A COMMON POTENTIAL POINT AND AT WHICH THE IMPEDANCE CONDITION OF THE FIRST VARIABLE-IMPEDANCE ELEMENT CONTROLS THE VOLTAGE ACROSS THE SECOND RADIATION ELEMENT AND THUS THE RADIATION EMISSION THEREFROM, MEANS FOR
Claim 2
Dependent Claim
111 words
AN ELECTRO-OPTICAL DEVICE COMPRISING A FIRST RADIATION-RESPONSIVE VARIABLE-IMPEDANCE ELEMENT FOR RECEIVING INPUT RADIATION, A FIRST VOLTAGE-RESPONSIVE RADIATION ELEMENT OPTICALLY COUPLED TO THE FIRST VARIABLE-IMPEDANCE ELEMENT AND PROVIDING OPTICAL FEEDBACK, A SECOND VOLTAGERESPONSIVE RADIATION ELEMENT OPTICALLY SHIELDED FROM THE FIRST VARIABLE-IMPEDANCE ELEMENT FOR PORDUCING OUTPUT RADIATION, A MAIN SOURCE OF POTENTIAL, MEANS CONNECTING THE MAIN POTENTIAL SOURCE TO THE FIRST VARIABLE-IMPEDANCE ELEMENT AND THE FIRST AND SECOND RADIATION ELEMENTS IN A STAR-CONNECTED CIRCUIT AT WHICH THE SAID ELEMENTS ARE CONNECTED TO A COMMON POTENTIAL POINT AND AT WHICH THE IMPEDANCE CONDITION OF THE FIRST VARIABLE-IMPEDANCE ELEMENT CONTROLS THE VOLTAGE ACROSS THE SECOND RADIATION ELEMENT AND THUS THE RADIATION EMISSION THEREFROM, MEANS FOR
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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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |