US2819837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor
Assignee: De Laval Steam Turbine Co
•
Filing: 1952-06-19
•
Granted: 1958-01-14
•
Expires: 1972-06-19
Abstract
No abstract record available.
Inventors
- 👤 William A Loeb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:09
CPC Classifications
F; F04; F04D; F04D21/00; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/441; F04D29/444
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735612A
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US1076617A
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US1462890A
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GB490501A
Cited
US2166823A
Cited
DE724553C
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US2273420A
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CH228507A
Cited
US2344366A
Cited
US2628768A
Cited
US2579049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |