US2765765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the manufacture of piezoelectric crystals
Assignee: Individual
•
Filing: 1952-09-03
•
Granted: 1956-10-09
•
Expires: 1972-09-03
Abstract
No abstract record available.
Inventors
- 👤 Robert R Bigler
- 👤 Jr William Schafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:55
CPC Classifications
H; H03; H03H; H03H3/00; H03H3/007; H03H3/02; Y; Y10; Y10T; Y10T29/00; Y10T29/42; Y10T29/49; Y10T29/49002; Y10T29/49004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1717193A
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US1765413A
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US2211583A
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US2384578A
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US2392429A
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US2505370A
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US2639392A
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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) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |