US2754259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for growing single crystals
Assignee: Sprague Electric Co
•
Filing: 1952-11-29
•
Granted: 1956-07-10
•
Expires: 1972-11-29
Abstract
No abstract record available.
Inventors
- 👤 Robinson Preston
- 👤 Edward D O'brian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:45
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/30; H01J37/305; H01J37/3053; C; C30; C30B; C30B23/00; C30B23/02; C30B23/06; Y; Y10; Y10S; Y10S117/00; Y10S117/905; Y10T; Y10T117/00; Y10T117/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A PROCESS FOR PRODUCING SINGLE CRYSTALS WHICH ARE SUITABLE FOR USE WITH A VARIETY OF ELECTRICAL APPLICATIONS WHICH COMPRISES ESTABLISHING ELECTRON CONDUCTANCE UNDER VACUUM BETWEEN AN ANODE AND CATHODE, FOCUSING THE ELECTRONS FROM SAID CATHODE INTO A BEAM WHICH INTERSECTS A TARGET MATERIAL AND WHICH VAPORIZES AT LEAST A PORTION OF SAID MATERIAL, CONDENSING SAID VAPOR UPON A SINGLE CRYSTAL BASE POSITIONED ADJACRNT TO SAID TARGET MEANS AND SLOWLY WITHDRAWING SAID SINGLE CRYSTAL BASE SO AS TO MAIN-
Claim 2
Dependent Claim
78 words
A PROCESS FOR PRODUCING SINGLE CRYSTALS WHICH ARE SUITABLE FOR USE WITH A VARIETY OF ELECTRICAL APPLICATIONS WHICH COMPRISES ESTABLISHING ELECTRON CONDUCTANCE UNDER VACUUM BETWEEN AN ANODE AND CATHODE, FOCUSING THE ELECTRONS FROM SAID CATHODE INTO A BEAM WHICH INTERSECTS A TARGET MATERIAL AND WHICH VAPORIZES AT LEAST A PORTION OF SAID MATERIAL, CONDENSING SAID VAPOR UPON A SINGLE CRYSTAL BASE POSITIONED ADJACRNT TO SAID TARGET MEANS AND SLOWLY WITHDRAWING SAID SINGLE CRYSTAL BASE SO AS TO MAIN-
References Cited (Backward Citations)
US1450464A
Cited
US2103623A
Cited
US2160981A
Cited
US2239642A
Cited
FR868386A
Cited
US2527747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |