US3408515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Second overtone dt-cut quartz resonator
Assignee: AT&T Inc
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Filing: 1966-03-25
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Granted: 1968-10-29
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Expires: 1986-03-25
Abstract
No abstract record available.
Inventors
- 👤 William C Morse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:28
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/54; H03H9/542; G; G04; G04F; G04F5/00; G04F5/04; G04F5/06; G04F5/063; H03H9/02; H03H9/02007; H03H9/02062; H03H9/0207; H03H9/02157; H03H9/56
Claims Analysis
Total Claims: 0
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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) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |