US3191047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical maser heterodyning using photoresponsive detectors
Assignee: HP Inc
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Filing: 1961-09-28
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Granted: 1965-06-22
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Expires: 1981-09-28
Abstract
No abstract record available.
Inventors
- 👤 Bernard M Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:26
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/60; G; G02; G02F; G02F2/00; G02F2/002; H04B10/61; H04B10/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
APPARATUS FOR DETECTING SIGNAL FROM A SOURCE OF COHERENT LIGHT, THE APPARATUS COMPRISING A LOCAL SOURCE OF COHERENT LIGHT, THE WAVELENGTH OF THE LIGHT FROM THE LOCAL SOURCE BEING A PREDETERMINED RELATIONSHIP TO THE WAVELENGTH OF THE LIGHT FROM THE SIGNAL SOURCE, A SURFACE EXHIBITING PARTIAL REFLECTION AND PARTIAL TRANSMISSION OF SAID LIGHT, THE SURFACE BEING DISPOSED TO RECEIVE ON THE OPPOSITE SIDES THEREOF THE LIGHT FROM SAID LOCAL SOURCE AND FROM THE SIGNAL SOURCE AND BEING ADAPTED TO PRODUCE FIRST AND SECOND WAVES FROM SAID RECEIVED LIGHT, THE FIRST WAVE HAVING A FREQUENCY EQUAL TO THE DIFFERENCE BETWEEN THE FREQUENCY OF LIGHT FROM SAID LOCAL AND SIGNAL SOURCES, THE SECOND WAVE HAVING THE FREQUENCY OF THE FIRST WAVE, A FIRST PHOTORESPONSIVE ELEMENT DISPOSED TO RECEIVE THE FIRST WAVE AND PRODUCE A FIRST SIGNAL THEREFROM, A SECOND PHOTORESPONSIVE ELEMENT DISPOSED TO RECEIVE THE SECOND WAVE AND PRODUCE A SECOND SIGNAL THEREFROM AND MEANS CONNECTED TO RECEIVE SAID FIRST AND SECOND SIGNALS FOR PRODUCING AN OUTPUT SIGNAL AS THE COMBINATION OF THE FIRST AND SECOND SIGNALS.
Claim 2
Dependent Claim
175 words
APPARATUS FOR DETECTING SIGNAL FROM A SOURCE OF COHERENT LIGHT, THE APPARATUS COMPRISING A LOCAL SOURCE OF COHERENT LIGHT, THE WAVELENGTH OF THE LIGHT FROM THE LOCAL SOURCE BEING A PREDETERMINED RELATIONSHIP TO THE WAVELENGTH OF THE LIGHT FROM THE SIGNAL SOURCE, A SURFACE EXHIBITING PARTIAL REFLECTION AND PARTIAL TRANSMISSION OF SAID LIGHT, THE SURFACE BEING DISPOSED TO RECEIVE ON THE OPPOSITE SIDES THEREOF THE LIGHT FROM SAID LOCAL SOURCE AND FROM THE SIGNAL SOURCE AND BEING ADAPTED TO PRODUCE FIRST AND SECOND WAVES FROM SAID RECEIVED LIGHT, THE FIRST WAVE HAVING A FREQUENCY EQUAL TO THE DIFFERENCE BETWEEN THE FREQUENCY OF LIGHT FROM SAID LOCAL AND SIGNAL SOURCES, THE SECOND WAVE HAVING THE FREQUENCY OF THE FIRST WAVE, A FIRST PHOTORESPONSIVE ELEMENT DISPOSED TO RECEIVE THE FIRST WAVE AND PRODUCE A FIRST SIGNAL THEREFROM, A SECOND PHOTORESPONSIVE ELEMENT DISPOSED TO RECEIVE THE SECOND WAVE AND PRODUCE A SECOND SIGNAL THEREFROM AND MEANS CONNECTED TO RECEIVE SAID FIRST AND SECOND SIGNALS FOR PRODUCING AN OUTPUT SIGNAL AS THE COMBINATION OF THE FIRST AND SECOND SIGNALS.
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) | 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 |