Patent US3418708A successfully refreshed from Google Patents.
US3418708A
Expired / Lapsed
US
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Method of making valves by electron beam welding
Assignee: Individual
•
Filing: 1964-01-20
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Granted: 1968-12-31
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Expires: 1984-01-20
Abstract
No abstract record available.
Inventors
- 👤 Chester A Siver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:45
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/02; B; B23; B23K; B23K15/00; B23K15/0046; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K41/00; F16K41/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412; Y10T29/49416; Y10T29/49421
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1987784A
Cited
US2632624A
Cited
US2903564A
Cited
US2887295A
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US2987610A
Cited
US3185815A
Cited
US2932720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |