US2787138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid mixing device
Assignee: BETZ Corp
•
Filing: 1955-04-18
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Granted: 1957-04-02
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Expires: 1975-04-18
Abstract
No abstract record available.
Inventors
- 👤 John R Boyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:51
CPC Classifications
F; F25; F25B; F25B39/00; F25B39/02; F25B39/028; F25B41/00; F25B41/40; F25B41/42; F25B41/45; Y; Y10; Y10T; Y10T137/00; Y10T137/8593
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) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |