US2438595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-frequency generator
Assignee: Girdler Corp
•
Filing: 1944-05-03
•
Granted: 1948-03-30
•
Expires: 1964-05-03
Abstract
No abstract record available.
Inventors
- 👤 Paul D Zottu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:13
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/46; H05B6/48; H05B6/50
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
SE73207C1
Cited
US507458A
Cited
GB149018A
Cited
US1753408A
Cited
US1947003A
Cited
US1986623A
Cited
US2048782A
Cited
US2018569A
Cited
US1983380A
Cited
US2026874A
Cited
US2218309A
Cited
US2105568A
Cited
US2160098A
Cited
US2147689A
Cited
US2239069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-30 | 1951-09-29 | 1952-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-30 | 1955-09-29 | 1956-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-30 | 1959-09-29 | 1960-03-30 | $7700.00 | Window Closed / Lapsed |