Patent US1928328A successfully refreshed from Google Patents.
US939136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blade of centrifugal fans.
Assignee: ELECTRIC AND ORDNANCE ACCESSORIES Co Ltd
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Filing: 1909-05-28
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Granted: 1909-11-02
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Expires: 1929-05-28
Abstract
No abstract record available.
Inventors
- 👤 Olaf Berg Jacobsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:35
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/08; F05; F05B; F05B2240/00; F05B2240/20; F05B2240/30; F05B2240/32; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72
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) | 1912-11-01 | 1913-05-03 | 1913-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-11-01 | 1917-05-03 | 1917-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-11-01 | 1921-05-03 | 1921-11-02 | $7700.00 | Window Closed / Lapsed |