US3201209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrothermal growth of zinc oxide crystals
Assignee: AT&T Inc
•
Filing: 1963-03-27
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Granted: 1965-08-17
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Expires: 1983-03-27
Abstract
No abstract record available.
Inventors
- 👤 Anthony J Caporaso
- 👤 Ernest D Kolb
- 👤 Robert A Laudise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:02
CPC Classifications
C; C01; C01G; C01G9/00; C01G9/02; C30; C30B; C30B29/00; C30B29/10; C30B29/16; C30B7/00; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1096
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD OF GROWING ZINC OXIDE CRYSTALS FROM A HYDROTHERMAL SOLUTION WHICH COMPRISES MAINTAINING A ZINC OXIDE CRYSTAL SEED AND A MASS OF NUTRIENT ZINC OXIDE IN AN AQUEOUS MEDIUM COMPRISING LITHIUM IONS AND A METAL HYDROXIDE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDES, STRONTIUM HYDROXIDE AND BARIUM HYDROXIDE AND MIXTURES THEREOF, THE LITHIUM ION AND THE METAL HYDROXIDE HAVING CONCENTRATION OF 0.1 TO 4.0 MOLAL AND 2 TO 8 MOLAL, RESPECTIVELY AT A TEMPERATURE OF AT LEAST 300* C. AT A PRESSURE OF AT LEAST 3200 P.S.I. WHILE MAINTAIN-
Claim 2
Independent Claim
92 words
A METHOD OF GROWING ZINC OXIDE CRYSTALS FROM A HYDROTHERMAL SOLUTION WHICH COMPRISES MAINTAINING A ZINC OXIDE CRYSTAL SEED AND A MASS OF NUTRIENT ZINC OXIDE IN AN AQUEOUS MEDIUM COMPRISING LITHIUM IONS AND A METAL HYDROXIDE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDES, STRONTIUM HYDROXIDE AND BARIUM HYDROXIDE AND MIXTURES THEREOF, THE LITHIUM ION AND THE METAL HYDROXIDE HAVING CONCENTRATION OF 0.1 TO 4.0 MOLAL AND 2 TO 8 MOLAL, RESPECTIVELY AT A TEMPERATURE OF AT LEAST 300* C. AT A PRESSURE OF AT LEAST 3200 P.S.I. WHILE MAINTAIN-
References Cited (Backward Citations)
US2508208A
Cited
US2697737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |