US2617974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric converting apparatus
Assignee: Fkg Fritz Kesselring Geratebau AG
•
Filing: 1949-04-13
•
Granted: 1952-11-11
•
Expires: 1969-04-13
Abstract
No abstract record available.
Inventors
- 👤 Kesselring Fritz
- 👤 Wettstein Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:29
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/20; H02M1/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2527220A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |