Patent US2638928A successfully refreshed from Google Patents.
Patent US2684830A successfully refreshed from Google Patents.
US2684830A
Expired / Lapsed
US
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Silent ball cock
Assignee: Individual
•
Filing: 1949-03-01
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Granted: 1954-07-27
•
Expires: 1969-03-01
Abstract
No abstract record available.
Inventors
- 👤 Albert R Stephany
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:46
CPC Classifications
F; F16; F16K; F16K47/00; F16K47/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7439; Y10T137/7446
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |