US2478749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination of a blocking layer rectifier plate having a cooling plate pressed on it
Assignee: Hartford National Bank and Trust Co
•
Filing: 1946-04-23
•
Granted: 1949-08-09
•
Expires: 1966-04-23
Abstract
No abstract record available.
Inventors
- 👤 Lange Cornelis De
- 👤 Duinker Daniel Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:39
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/60; H10D; H10D48/00; H10D48/01; H10D48/04; H10D99/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE525665C
Cited
US2345038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-08 | 1953-02-07 | 1953-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-08 | 1957-02-07 | 1957-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-08 | 1961-02-07 | 1961-08-09 | $7700.00 | Window Closed / Lapsed |