US3020132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single crystal refining
Assignee: International Business Machines Corp
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Filing: 1959-04-30
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Granted: 1962-02-06
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Expires: 1979-04-30
Abstract
No abstract record available.
Inventors
- 👤 Gerard R Gunther-Mohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:18
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/0206; D02G1/0266; C; C30; C30B; C30B13/00; C30B13/16; C30B13/22; C30B13/24; Y; Y10; Y10S; Y10S148/00; Y10S148/074; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1076; Y10T117/108; Y10T117/1088
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
45 words
A METHOD OF SINGLE CRYSTAL REFINING COMPRISING THE STEPS OF PROVIDING A SEED CRYSTAL IN CONTACT WITH A QUANTITY OF LONGITUDINALLY DISPOSED MATERIAL, PROVIDING A PLURALITY OF SOURCES OF HEAT EACH CAPABLE OF RENDERING A DISCRETE PORTION OF SAID MATERIAL IN A MOLTEN CONDITION, PROVIDING
References Cited (Backward Citations)
US2739088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |