US3378409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of crystalline material
Assignee: UK Minister of Aviation
•
Filing: 1964-05-14
•
Granted: 1968-04-16
•
Expires: 1984-05-14
Abstract
No abstract record available.
Inventors
- 👤 Hurle Donald Thomas James
- 👤 Mullin John Brian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:38
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/16; C30B13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR THE PRODUCTION OF MICROSOPICALLY UNIFORM SINGLE CRYSTAL MATERIAL FROM MATERIAL WHICH IS SUBJECT TO CONSTITUTIONAL SUPERCOOLING INCLUDING THE STEPS OF FORMING A THIN CONCENTRATED LIQUID ALLOY ZONE IN STARTING MATERIAL SAID ZONE BEING LESS THAN 0.01 INCH THICK, AND MOVING SAID THIN CONCENTRATED LIQUID ALLOY ZONE BY CAUSING AN ELECTRIC CURRENT TO FLOW IN THE MATERIAL SAID PROCESS BEING CARRIED OUT SUBSTANTIALLY ISOTHERMALLY SUCH THAT TEMPERATURE GRADIENTS WHICH MIGHT AID OR DETER THE MOVEMENT OF THE LIQUID ALLOY ZONE ARE SUBSTANTIALLY ABSENT.
Claim 2
Dependent Claim
85 words
A PROCESS FOR THE PRODUCTION OF MICROSOPICALLY UNIFORM SINGLE CRYSTAL MATERIAL FROM MATERIAL WHICH IS SUBJECT TO CONSTITUTIONAL SUPERCOOLING INCLUDING THE STEPS OF FORMING A THIN CONCENTRATED LIQUID ALLOY ZONE IN STARTING MATERIAL SAID ZONE BEING LESS THAN 0.01 INCH THICK, AND MOVING SAID THIN CONCENTRATED LIQUID ALLOY ZONE BY CAUSING AN ELECTRIC CURRENT TO FLOW IN THE MATERIAL SAID PROCESS BEING CARRIED OUT SUBSTANTIALLY ISOTHERMALLY SUCH THAT TEMPERATURE GRADIENTS WHICH MIGHT AID OR DETER THE MOVEMENT OF THE LIQUID ALLOY ZONE ARE SUBSTANTIALLY ABSENT.
References Cited (Backward Citations)
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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) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |