Patent US2921535A successfully refreshed from Google Patents.
US2921535A
Expired / Lapsed
US
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Fluid translating device
Assignee: Individual
•
Filing: 1956-09-17
•
Granted: 1960-01-19
•
Expires: 1976-09-17
Abstract
No abstract record available.
Inventors
- 👤 Clinton M Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:24
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/10; F04C15/00; F04C15/06; F04C15/062
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) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |