Patent US2463984A successfully refreshed from Google Patents.
Patent US1151964A successfully refreshed from Google Patents.
US1151964A
Expired / Lapsed
US
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Balancing of centrifugal pumps.
Assignee: De Laval Steam Turbine Co
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Filing: 1913-08-12
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Granted: 1915-08-31
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Expires: 1933-08-12
Abstract
No abstract record available.
Inventors
- 👤 Per Arvid Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:56
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2261; F04D29/2266
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1918-08-30 | 1919-03-01 | 1919-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1922-08-30 | 1923-03-01 | 1923-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1926-08-30 | 1927-03-01 | 1927-08-31 | $7700.00 | Window Closed / Lapsed |