Patent US2943638A successfully refreshed from Google Patents.
US2943638A
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US
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Flow restricting device
Assignee: General Electric Co
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Filing: 1957-05-20
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Granted: 1960-07-05
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Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 Richard V Prucha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:31
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F16; F16K; F16K15/00; F16K15/14; F16K15/144; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7785; Y10T137/7837; Y10T137/7847; Y10T137/7879; Y10T137/7887
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |