US2674520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for growing single crystals of quartz
Assignee: Clevite Corp
•
Filing: 1950-04-11
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Granted: 1954-04-06
•
Expires: 1970-04-11
Abstract
No abstract record available.
Inventors
- 👤 Andrew R Sobek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:27
CPC Classifications
C; C30; C30B; C30B7/00; C30B7/10; C01; C01B; C01B33/00; C01B33/113; C01B33/12; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1096
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
APPARATUS FOR GROWING SINGLE CRYSTALS OF QUARTZ, COMPRISING: A PRESSURE VESSEL ADAPTED TO CONTAIN A SILICEOUS FLUID; AND A HOLDING STRUCTURE, SUPPORTED WITHIN SAID VESSEL, OF SHEET METAL, GENERALLY U-SHAPED IN CROSS SECTION, WITH THE LEGS OF THE U FORMING TWO LONGITUDINALLY EXTENSIVE SPACED OPPOSED SURFACES HAVING OPPOSED INDENTATIONS IN EACH OF SAID TWO OPPOSED SURFACES, SAID INDENTATIONS BEING ADAPTED TO ENGAGE INDIVIDUALLY THE TWO OPPOSITE EDGE PORTIONS OF AT LEAST ONE QUARTZ SEED PLATE AND TO SUPPORT SAID EDGE PORTIONS IN PROXIMITY TO SAID RESPECTIVE OPPOSED SURFACES.
Claim 2
Dependent Claim
88 words
APPARATUS FOR GROWING SINGLE CRYSTALS OF QUARTZ, COMPRISING: A PRESSURE VESSEL ADAPTED TO CONTAIN A SILICEOUS FLUID; AND A HOLDING STRUCTURE, SUPPORTED WITHIN SAID VESSEL, OF SHEET METAL, GENERALLY U-SHAPED IN CROSS SECTION, WITH THE LEGS OF THE U FORMING TWO LONGITUDINALLY EXTENSIVE SPACED OPPOSED SURFACES HAVING OPPOSED INDENTATIONS IN EACH OF SAID TWO OPPOSED SURFACES, SAID INDENTATIONS BEING ADAPTED TO ENGAGE INDIVIDUALLY THE TWO OPPOSITE EDGE PORTIONS OF AT LEAST ONE QUARTZ SEED PLATE AND TO SUPPORT SAID EDGE PORTIONS IN PROXIMITY TO SAID RESPECTIVE OPPOSED SURFACES.
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) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |