US2537043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for synthesizing large single crystals of quartz
Assignee: Individual
•
Filing: 1948-04-29
•
Granted: 1951-01-09
•
Expires: 1968-04-29
Abstract
No abstract record available.
Inventors
- 👤 Isidore I Friedman
- 👤 Paul H Egli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:23
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/14; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1096
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
THE METHOD OF GROWING LARGE SINGLE CRYSTALS OF QUARTZ ON SEED CRYSTALS ROTATABLY MOUNTED WITHIN THE FOLLOWING DEFINED SOLUTION, COMPRISING PREPARING A SOLUTION OF SILICA IN AN ALKALI METAL HYDROXIDE AT A TEMPERATURE WITHIN THE RANGE OF 350* C. TO 450* C. EQUILIBRATING THE SOLUTION AT A TEMPERTURE WITHIN THIS TEMPERATURE RANGE FOR A PERIOD OF TIME, COOLING THE SOLUTION AT A PREDETERMINED RATE TO A TEMPERATURE ABOUT FIFTY TO ONE HUNDRED AND FIFTY DEGREES C. BELOW THE TEMPERTURE OF EQUILIBRATION, FORCING CARBON DIOXIDE INTO THE SOLUTION AT A SLOW RATE OF FLOW AND IN SUFFICIENT QUANTITY TO CONVERT THE ALKALI METAL HYDROXIDE AND THE ALKALI METAL SILICATE TO ALKALI METAL BICARBONATES AND FREE SILICA WHICH PRECIPITATES OUT OF SAID SOLUTION AS QUARTZ ON SAID SEED CRYSTALS AND REPEATING THESE METHOD STEPS USING THE SAME SEED CRYSTALS UNTIL CRYSTALS OF THE DESIRED SIZE ARE GROWN.
Claim 2
Independent Claim
145 words
THE METHOD OF GROWING LARGE SINGLE CRYSTALS OF QUARTZ ON SEED CRYSTALS ROTATABLY MOUNTED WITHIN THE FOLLOWING DEFINED SOLUTION, COMPRISING PREPARING A SOLUTION OF SILICA IN AN ALKALI METAL HYDROXIDE AT A TEMPERATURE WITHIN THE RANGE OF 350* C. TO 450* C. EQUILIBRATING THE SOLUTION AT A TEMPERTURE WITHIN THIS TEMPERATURE RANGE FOR A PERIOD OF TIME, COOLING THE SOLUTION AT A PREDETERMINED RATE TO A TEMPERATURE ABOUT FIFTY TO ONE HUNDRED AND FIFTY DEGREES C. BELOW THE TEMPERTURE OF EQUILIBRATION, FORCING CARBON DIOXIDE INTO THE SOLUTION AT A SLOW RATE OF FLOW AND IN SUFFICIENT QUANTITY TO CONVERT THE ALKALI METAL HYDROXIDE AND THE ALKALI METAL SILICATE TO ALKALI METAL BICARBONATES AND FREE SILICA WHICH PRECIPITATES OUT OF SAID SOLUTION AS QUARTZ ON SAID SEED CRYSTALS AND REPEATING THESE METHOD STEPS USING THE SAME SEED CRYSTALS UNTIL CRYSTALS OF THE DESIRED SIZE ARE GROWN.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |