US3027281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single crystals of brittle materials
Assignee: Westinghouse Electric Corp
•
Filing: 1958-05-16
•
Granted: 1962-03-27
•
Expires: 1978-05-16
Abstract
No abstract record available.
Inventors
- 👤 John A Osborn
- 👤 Richard C Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:48
CPC Classifications
C; C30; C30B; C30B1/00; C30B1/02; C30B1/06; C22; C22F; C22F1/00; C30B29/00; C30B29/10; C30B29/52
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
91 words
A METHOD OF PREPARING A SINGLE CRYSTAL OF A BRITTLE ALLOY CONSISTING ESSENTIALLY OF ABOUT 14 TO 18 PERCENT BY WEIGHT OF ALUMINUM AND THE BALANCE SUBSTANTIAL ALL IRON AND INCIDENTAL IMPURITIES WHICH COMPRISES HEATING SUCH A MATERIAL TO A TEMPERATURE WITHIN THE RANGE OF ABOUT 200* TO 500* C. STRAINING SAID MATERIAL AT SAID TEMPERATURE TO STRETCH IT CRITICALLY WITHIN THE RANGE OF ABOUT 2 TO 6 PERCENT, AND THEREAFTER ANNEALING THE STRAINED MATERIAL TO GROW A SINGLE CRYSTAL THEREOF BY MOVING IT THROUGH A ZONE OF HIGH TEMPERATURE GRADIENT.
References Cited (Backward Citations)
US2801942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |