Patent US2491677A successfully refreshed from Google Patents.
US2491677A
Expired / Lapsed
US
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Grit blasting of rotor housings
Assignee: Borg Warner Corp
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Filing: 1943-09-27
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Granted: 1949-12-20
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Expires: 1963-09-27
Abstract
No abstract record available.
Inventors
- 👤 Robert P Mcculloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:32
CPC Classifications
F; F04; F04C; F04C18/00; F04C18/08; F04C18/12; F04C18/123; F01; F01C; F01C21/00; F01C21/10; F01C21/104; F02; F02B; F02B33/00; F04C18/082; F04C18/084; F02M; F02M2700/00; F02M2700/33; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T29/00; Y10T29/46; Y10T29/49; Y10T29/49316; Y10T29/4932; Y10T29/49758
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US693609A
Cited
US971660A
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US902702A
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US1404989A
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US1631359A
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US1563583A
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US1784866A
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GB464475A
Cited
US2248530A
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US2397067A
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US2337903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |