US2615797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of growing piezoelectric crystals
Assignee: International Standard Electric Corp
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Filing: 1947-07-23
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Granted: 1952-10-28
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Expires: 1967-07-23
Abstract
No abstract record available.
Inventors
- 👤 Bruzau Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:05
CPC Classifications
C; C01; C01B; C01B25/00; Y; Y10; Y10S; Y10S117/00; Y10S117/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
PROCESS FOR MANUFACTURING ABNORMALLY LARGE CRYSTALS SUITABLE FOR OPTICAL AND PIEZOELECTRIC USES, THAT COMPRISES REGULATING GROWTH OF SAID CRYSTALS FROM A GERM CRYSTAL OF POTASSIUM PHOSPHATE IN A SUPER SATURATED SOLUTION OF THE ACID SALT OF POTASSIUM PHOSPHATE, ALSO CONTAINING IN A DISSOLVED STATE, THE BORATE OF THE SAME METAL.
Claim 2
Dependent Claim
50 words
PROCESS FOR MANUFACTURING ABNORMALLY LARGE CRYSTALS SUITABLE FOR OPTICAL AND PIEZOELECTRIC USES, THAT COMPRISES REGULATING GROWTH OF SAID CRYSTALS FROM A GERM CRYSTAL OF POTASSIUM PHOSPHATE IN A SUPER SATURATED SOLUTION OF THE ACID SALT OF POTASSIUM PHOSPHATE, ALSO CONTAINING IN A DISSOLVED STATE, THE BORATE OF THE SAME METAL.
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) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |