US1127371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for amplifying or detecting electrical variations.
Assignee: Individual
•
Filing: 1914-03-11
•
Granted: 1915-02-02
•
Expires: 1934-03-11
Abstract
No abstract record available.
Inventors
- 👤 George W Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:41
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/24; B23K11/248; H; H01; H01J; H01J17/00; H01J17/50; H01J17/52; H01J17/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1918-02-01 | 1918-08-03 | 1919-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1922-02-01 | 1922-08-03 | 1923-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1926-02-01 | 1926-08-03 | 1927-02-02 | $7700.00 | Window Closed / Lapsed |