US2755989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling system for shafts and bearings
Assignee: Individual
•
Filing: 1952-10-01
•
Granted: 1956-07-24
•
Expires: 1972-10-01
Abstract
No abstract record available.
Inventors
- 👤 Richard W Coward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:39
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/05; F04D29/053; F04D29/58; F04D29/582; F04D29/584; F04D29/056
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) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |