Patent US1929117A successfully refreshed from Google Patents.
Patent US2704349A successfully refreshed from Google Patents.
US2704349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical instrument
Assignee: —
•
Filing: —
•
Granted: 1955-03-15
•
Expires: 1972-03-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:41
CPC Classifications
G; G01; G01R; G01R11/00; G01R11/02; G01R11/04; G01D; G01D13/00; G01D13/22; G01R11/06; G01D2213/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1580768A
Cited
US1638276A
Cited
US1927346A
Cited
US2284048A
Cited
US2367449A
Cited
US2425595A
Cited
US2528640A
Cited
US2515021A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-14 | 1958-09-13 | 1959-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-14 | 1962-09-13 | 1963-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-14 | 1966-09-13 | 1967-03-15 | $7700.00 | Window Closed / Lapsed |