US1909480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing wear rings
Assignee: Everlasting Valve Co Inc
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Filing: 1931-06-18
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Granted: 1933-05-16
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Expires: 1951-06-18
Abstract
No abstract record available.
Inventors
- 👤 Wylie G Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:01
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/76; B21K1/761; B21K1/20; B21K1/24; B21K25/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49826; Y10T29/49863; Y10T29/49908; Y10T29/49938
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) | 1936-05-15 | 1936-11-14 | 1937-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-05-15 | 1940-11-14 | 1941-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-05-15 | 1944-11-14 | 1945-05-16 | $7700.00 | Window Closed / Lapsed |