US2602139A
Expired / Lapsed
US
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Bridge oscillator
Assignee: General Precision Laboratory Inc
•
Filing: 1948-08-10
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Granted: 1952-07-01
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Expires: 1968-08-10
Abstract
No abstract record available.
Inventors
- 👤 Wayne K Hodder
- 👤 George R Gamertsfelder
- 👤 Jr Arvid W Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:30
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/08; H03B5/14
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) | 1955-07-01 | 1955-12-31 | 1956-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-01 | 1959-12-31 | 1960-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-01 | 1963-12-31 | 1964-07-01 | $7700.00 | Window Closed / Lapsed |