US3011322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of refrigeration centrifugal compressor
Assignee: Dresser Operations Inc
•
Filing: 1958-08-12
•
Granted: 1961-12-05
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Expires: 1978-08-12
Abstract
No abstract record available.
Inventors
- 👤 Eric W Tanzberger
- 👤 Charles E Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:16
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/04; F25B1/053; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/46; F04D29/462; F05; F05D; F05D2250/00; F05D2250/50; F05D2250/51
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733853A
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US2734346A
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US2300766A
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US2277647A
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US2720083A
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US2671604A
Cited
US2817475A
Cited
US2888809A
Cited
US2817213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |