Patent US4595962A successfully refreshed from Google Patents.
Patent US1738169A successfully refreshed from Google Patents.
US1738169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rectifier
Assignee: OLD COLONY TRUST Co
•
Filing: 1926-05-08
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Granted: 1929-12-03
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Expires: 1946-05-08
Abstract
No abstract record available.
Inventors
- 👤 Thorndike F Cheney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:37
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/02; H01J17/04; H01J17/38; H01J17/40; H01J2893/00; H01J2893/0064; H01J2893/0065; H01J2893/0067
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) | 1932-12-02 | 1933-06-03 | 1933-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-12-02 | 1937-06-03 | 1937-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-12-02 | 1941-06-03 | 1941-12-03 | $7700.00 | Window Closed / Lapsed |