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US2807871A
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Method of making an impeller
Assignee: Ingersoll Rand Co
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Filing: 1957-01-22
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Granted: 1957-10-01
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Expires: 1977-01-22
Abstract
No abstract record available.
Inventors
- 👤 John H Wagner
- 👤 Edmund C Curry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:45
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/78; F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/284; F04D29/60; F04D29/62; F04D29/624; F04D29/285; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2384265A
Cited
US2336303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |