Patent US3393140A successfully refreshed from Google Patents.
US3393140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making divalent rare earth laser crystals in an electric field
Assignee: United States Department of the Air Force
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Filing: 1965-02-16
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Granted: 1968-07-16
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Expires: 1985-02-16
Abstract
No abstract record available.
Inventors
- 👤 Francis K Fong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:07
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/16; H01S3/163; H01S3/1645; H01S3/165; H01S3/1601; H01S3/1603; H01S3/1606
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
THE PROCESS OF PRODUCING A STABLE DIVALENT RARE EARTH LASER CRYSTAL FROM A CAF2:DY+3 CRYSTAL COMPRISING THE STEPS OF POSITIONING THE CRYSTAL BETWEEN A TUNGSTEN POINT CATHODE AND A GOLD SHEET ANODE, INCREASING THE TEMPERATURE OF THE CRYSTAL ABOVE ABOUT 300*C., IMPRESSING A POTENTIAL OF ABOUT 300 VOLTS BETWEEN THE CATHODE AND THE ANODE AND THROUGH THE CRYSTAL, AND MAINTAINING THE CRYSTAL ABOVE ABOUT 300*C. AND UP TO ABOUT 300 VOLTS TO THE PRODUCTION OF THE STABLE DIVALENT RARE EARTH LASER CRYSTAL.
Claim 2
Dependent Claim
82 words
THE PROCESS OF PRODUCING A STABLE DIVALENT RARE EARTH LASER CRYSTAL FROM A CAF2:DY+3 CRYSTAL COMPRISING THE STEPS OF POSITIONING THE CRYSTAL BETWEEN A TUNGSTEN POINT CATHODE AND A GOLD SHEET ANODE, INCREASING THE TEMPERATURE OF THE CRYSTAL ABOVE ABOUT 300*C., IMPRESSING A POTENTIAL OF ABOUT 300 VOLTS BETWEEN THE CATHODE AND THE ANODE AND THROUGH THE CRYSTAL, AND MAINTAINING THE CRYSTAL ABOVE ABOUT 300*C. AND UP TO ABOUT 300 VOLTS TO THE PRODUCTION OF THE STABLE DIVALENT RARE EARTH LASER CRYSTAL.
Claim 3
Dependent Claim
83 words
THE PROCESS OF PRODUCING A STABLE DIVALENT RARE EARTH LASER CRYSTAL FROM A SRCL2:HO+3 CRYSTAL COMPRISING THE STEPS OF POSITIONING THE CRYSTAL BETWEEN A TUNGSTEN POINT CATHODE AND A GOLD SHEET ANODE, INCREASING THE TEMPERATURE OF THE CRYSTAL TO ABOV ABOUT 300*C., IMPRESSING A POTENTIAL UP TO ABOUT 300 VOLTS BETWEEN THE CATHODE AND THE ANODE AND THROUGH THE CRYSTAL, AND MAINTAINING THE CRYSTAL ABOVE ABOUT 300*C. AND UP TO 300 VOLTS TO THE PRODUCTION OF THE STABLE DIVALENT RARE EARTH LASER CRYSTAL.
Claim 4
Dependent Claim
83 words
THE PROCESS OF PRODUCING A STABLE DIVALENT RARE EARTH LASER CRYSTAL FROM A SRCL2:HO+3 CRYSTAL COMPRISING THE STEPS OF POSITIONING THE CRYSTAL BETWEEN A TUNGSTEN POINT CATHODE AND A GOLD SHEET ANODE, INCREASING THE TEMPERATURE OF THE CRYSTAL TO ABOV ABOUT 300*C., IMPRESSING A POTENTIAL UP TO ABOUT 300 VOLTS BETWEEN THE CATHODE AND THE ANODE AND THROUGH THE CRYSTAL, AND MAINTAINING THE CRYSTAL ABOVE ABOUT 300*C. AND UP TO 300 VOLTS TO THE PRODUCTION OF THE STABLE DIVALENT RARE EARTH LASER CRYSTAL.
Claim 5
Dependent Claim
84 words
THE PROCESS OF PRODUCING A STABLE DIVALENT RARE EARTH LASER CRYSTAL FROM A BABR2:TM+3 CRYSTALCOMPRISING THE STEPS OF POSITIONING THE CRYSTAL BETWEEN A TUNGSTEN POINT CATHODE AND A GOLD SHEET ANODE, INCREASING THE TEMPERATURE OF THE CRYSTAL TO ABOVE ABOUT 300*C., IMPRESSING A POTENTIAL UP TO ABOUT 300 VOLTS BETWEEN THE CATHODE AND THE ANODE AND THROUGH THE CRYSTAL, AND MAINTAINING THE CRYSTAL AT ABOVE ABOUT 300*C. AND UP TO ABOUT 300 VOLTS TO THE PRODUCTION OF THE STABLE DIVALENT RARE EARTH LASER CRYSTAL.
Claim 6
Dependent Claim
84 words
THE PROCESS OF PRODUCING A STABLE DIVALENT RARE EARTH LASER CRYSTAL FROM A BABR2:TM+3 CRYSTALCOMPRISING THE STEPS OF POSITIONING THE CRYSTAL BETWEEN A TUNGSTEN POINT CATHODE AND A GOLD SHEET ANODE, INCREASING THE TEMPERATURE OF THE CRYSTAL TO ABOVE ABOUT 300*C., IMPRESSING A POTENTIAL UP TO ABOUT 300 VOLTS BETWEEN THE CATHODE AND THE ANODE AND THROUGH THE CRYSTAL, AND MAINTAINING THE CRYSTAL AT ABOVE ABOUT 300*C. AND UP TO ABOUT 300 VOLTS TO THE PRODUCTION OF THE STABLE DIVALENT RARE EARTH LASER CRYSTAL.
References Cited (Backward Citations)
FR1301149A
Cited
US3337439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |