Patent US727381A successfully refreshed from Google Patents.
US727381A
Expired / Lapsed
US
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Means for prevention of weakening propeller-shafts by electrolysis.
Assignee: Individual
•
Filing: 1902-04-05
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Granted: 1903-05-05
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Expires: 1922-04-05
Abstract
No abstract record available.
Inventors
- 👤 Adolphus A Knudson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:31
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/12; F16C33/121; F16C17/00; F16C17/02; F16C2202/00; F16C2202/30; F16C2202/32; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/939; Y10S277/941
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) | 1906-05-04 | 1906-11-03 | 1907-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1910-05-04 | 1910-11-03 | 1911-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1914-05-04 | 1914-11-03 | 1915-05-05 | $7700.00 | Window Closed / Lapsed |