US2895812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Growing of quartz crystals
Assignee: AT&T Inc
•
Filing: 1954-07-28
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Granted: 1959-07-21
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Expires: 1974-07-28
Abstract
No abstract record available.
Inventors
- 👤 Girard T Kohman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:19
CPC Classifications
C; 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
82 words
THE METHOD OF GROWING QUARTZ CRYSTALS IN A SEALED CYLINDRICAL AUTOCLAVE MOUNTED WITH ITS AXIS SUBSTANTIALLY VERTICAL AND CONTAINING A BAFFLE AT A POINT BETWEEN ITS ENDS WHICH CLOSES OFF A PORTION ONLY OF THE HORIZONTAL CROSSSECTIONAL AREA OF SAID AUTOCLAVE, SAID PORTION BEING AT LEAST 50 PERCENT OF THE CROSS SECTIONAL AREA, WHICH METHOD COMPRISES CHARGING SAID AUTOCLAVE WITH A CRYSTALLINE QUARTZ NUTRIENT BELOW SAID BAFFLE, AT LEAST ONE QUARTZ SEED ABOVE SAID BAFFLE AND AN AMOUNT OF AN AQUEOUS MEDIUM
Claim 2
Independent Claim
82 words
THE METHOD OF GROWING QUARTZ CRYSTALS IN A SEALED CYLINDRICAL AUTOCLAVE MOUNTED WITH ITS AXIS SUBSTANTIALLY VERTICAL AND CONTAINING A BAFFLE AT A POINT BETWEEN ITS ENDS WHICH CLOSES OFF A PORTION ONLY OF THE HORIZONTAL CROSSSECTIONAL AREA OF SAID AUTOCLAVE, SAID PORTION BEING AT LEAST 50 PERCENT OF THE CROSS SECTIONAL AREA, WHICH METHOD COMPRISES CHARGING SAID AUTOCLAVE WITH A CRYSTALLINE QUARTZ NUTRIENT BELOW SAID BAFFLE, AT LEAST ONE QUARTZ SEED ABOVE SAID BAFFLE AND AN AMOUNT OF AN AQUEOUS MEDIUM
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) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |