US2825811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillators
Assignee: Muirhead and Co Ltd
•
Filing: 1955-04-01
•
Granted: 1958-03-04
•
Expires: 1975-04-01
Abstract
No abstract record available.
Inventors
- 👤 Cooper Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:26
CPC Classifications
H; H03; H03L; H03L5/00; F; F16; F16D; F16D3/00; F16D3/50; F16D3/56; F16D3/58; H03B; H03B5/00; H03B5/20; H03B5/26; H03B5/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2258128A
Cited
US2641705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |