Patent US2876946A successfully refreshed from Google Patents.
US2876946A
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Centrifugal blower
Assignee: Ingersoll Rand Co
•
Filing: 1954-06-01
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Granted: 1959-03-10
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Expires: 1974-06-01
Abstract
No abstract record available.
Inventors
- 👤 Hornschuch Hanns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:10
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/441
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US778590A
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US911802A
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GB191327255A
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US1556771A
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GB341305A
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GB341640A
Cited
US2171341A
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US2225398A
Cited
GB609971A
Cited
US2690131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |