US2714648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency heating
Assignee: Hartford National Bank and Trust Co
•
Filing: 1952-05-21
•
Granted: 1955-08-02
•
Expires: 1972-05-21
Abstract
No abstract record available.
Inventors
- 👤 Blok Lourens
- 👤 Dirk Christiaan Van Iperen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:42
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/36; H05B6/362
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2271916A
Cited
US2321189A
Cited
US2353130A
Cited
US2402508A
Cited
US2471471A
Cited
US2528714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-01 | 1959-01-31 | 1959-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-01 | 1963-01-31 | 1963-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-01 | 1967-01-31 | 1967-08-02 | $7700.00 | Window Closed / Lapsed |