US2587154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary fluid coupling
Assignee: Individual
•
Filing: 1946-10-26
•
Granted: 1952-02-26
•
Expires: 1966-10-26
Abstract
No abstract record available.
Inventors
- 👤 Vernon O Hartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:10
CPC Classifications
F; F16; F16D; F16D33/00; F16D33/02; F16D33/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US905885A
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US1540453A
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US2150539A
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US2190830A
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US2303829A
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US2377009A
Cited
US2333674A
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US2428134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |