US2768352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor-expander transmission system
Assignee: Telefonaktiebolaget LM Ericsson AB
•
Filing: 1951-10-10
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Granted: 1956-10-23
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Expires: 1971-10-10
Abstract
No abstract record available.
Inventors
- 👤 Sivers Carl Henric Von
- 👤 Wado Kurt Reid
- 👤 Wickman Klas Rudolf
- 👤 Person Lars Bernhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:15
CPC Classifications
H; H03; H03G; H03G7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1737830A
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US2003428A
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US2171671A
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US2193966A
Cited
US2252002A
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US2213991A
Cited
US2387652A
Cited
US2434155A
Cited
US2438518A
Cited
US2560709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |