US1987784A
Expired / Lapsed
US
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Method of forming valve seat inserts
Assignee: Wilcox Rich Corp
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Filing: 1932-04-14
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Granted: 1935-01-15
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Expires: 1952-04-14
Abstract
No abstract record available.
Inventors
- 👤 Charles B Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:03
CPC Classifications
B; B21; B21K; B21K21/00; B21K21/16; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/20; B21C37/205; B21J; B21J9/00; B21J9/02; B21J9/06; B21K1/00; B21K1/20; B21K1/76; B21K1/761; B21K25/00; F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/42; F16K1/46; F16K1/465; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/4927; Y10T29/49272; Y10T29/49298; Y10T29/49306; Y10T29/49789; Y10T29/49792; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/125
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) | 1938-01-14 | 1938-07-16 | 1939-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-01-14 | 1942-07-16 | 1943-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-01-14 | 1946-07-16 | 1947-01-15 | $7700.00 | Window Closed / Lapsed |