Patent US1521858A successfully refreshed from Google Patents.
US1521858A
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Centrifugal machine and method of balancing same
Assignee: BERTHA M BOCK
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Filing: 1920-10-14
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Granted: 1925-01-06
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Expires: 1940-10-14
Abstract
No abstract record available.
Inventors
- 👤 Bock William Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:40
CPC Classifications
D; D06; D06F; D06F37/00; D06F37/20; D06F37/24; D06F37/245; Y; Y10; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0898; Y10T74/00; Y10T74/21; Y10T74/2109
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) | 1928-01-06 | 1928-07-07 | 1929-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-01-06 | 1932-07-07 | 1933-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-01-06 | 1936-07-07 | 1937-01-06 | $7700.00 | Window Closed / Lapsed |