Patent US2819012A successfully refreshed from Google Patents.
US2819012A
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US
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Centrifugal compressor
Assignee: Motors Liquidation Co
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Filing: 1950-12-22
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Granted: 1958-01-07
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Expires: 1970-12-22
Abstract
No abstract record available.
Inventors
- 👤 Robert P Atkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:03
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/284; F04D29/285
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE460985C
Cited
US1097729A
Cited
GB279426A
Cited
GB512098A
Cited
US2228194A
Cited
US2398203A
Cited
US2399852A
Cited
GB619617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |