Patent US2531660A successfully refreshed from Google Patents.
US2531660A
Expired / Lapsed
US
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Fabrication of piezoelectric crystal units
Assignee: AT&T Inc
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Filing: 1949-08-27
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Granted: 1950-11-28
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Expires: 1969-08-27
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:13
CPC Classifications
H; H03; H03H; H03H3/00; H03H3/007; H03H3/02; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
IN THE METHOD OF EQUIPPING A CRYSTAL WITH A LEAD WIRE, THE STEP COMPRSING SECURING A DISC TO THE CRYSTAL BY AN ADHESIVE AND IMPARTING RELATIVE MOTION BETWEEN THE DISC AND THE CRYSTAL TO SPREAD THE ADHESIVE OVER A WIDER AREA OF THE CRYSTAL.
Claim 2
Dependent Claim
44 words
IN THE METHOD OF EQUIPPING A CRYSTAL WITH A LEAD WIRE, THE STEP COMPRSING SECURING A DISC TO THE CRYSTAL BY AN ADHESIVE AND IMPARTING RELATIVE MOTION BETWEEN THE DISC AND THE CRYSTAL TO SPREAD THE ADHESIVE OVER A WIDER AREA OF THE CRYSTAL.
References Cited (Backward Citations)
US2397744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |