US2289954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leakage reducing means
Assignee: Brush Development Co
•
Filing: 1942-01-08
•
Granted: 1942-07-14
•
Expires: 1962-01-08
Abstract
No abstract record available.
Inventors
- 👤 Jr John P Arndt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:32
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/54; H03H9/58; H03H9/60; H03H9/02; H03H9/02007; H03H9/02086; H03H9/02125; H03H9/545; H04; H04R; H04R17/00; H04R17/02; Y; Y10; Y10T; Y10T24/00; Y10T24/14
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) | 1945-07-13 | 1946-01-12 | 1946-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-13 | 1950-01-12 | 1950-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-13 | 1954-01-12 | 1954-07-14 | $7700.00 | Window Closed / Lapsed |