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US1422972A
Expired / Lapsed
US
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Dustproof oil ring
Assignee: Individual
•
Filing: 1918-04-25
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Granted: 1922-07-18
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Expires: 1938-04-25
Abstract
No abstract record available.
Inventors
- 👤 Henry William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:06
CPC Classifications
F; F01; F01M; F01M9/00; F01M9/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49702; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20732; Y10T74/20744
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) | 1925-07-17 | 1926-01-16 | 1926-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-07-17 | 1930-01-16 | 1930-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-07-17 | 1934-01-16 | 1934-07-18 | $7700.00 | Window Closed / Lapsed |