Patent US3394728A successfully refreshed from Google Patents.
US3394728A
Expired / Lapsed
US
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Welded slide valve casing
Assignee: Hermann Rappold and Co GmbH
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Filing: 1965-06-03
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Granted: 1968-07-30
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Expires: 1985-06-03
Abstract
No abstract record available.
Inventors
- 👤 Uerlichs Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:57
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/04; F16K27/044; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6579
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US610076A
Cited
US997461A
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US1070693A
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US2121686A
Cited
US2884959A
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US3068888A
Cited
US3202171A
Cited
US3266517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |