US2701684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil circulating system for rotary fluid compressors
Assignee: Worthington Corp
•
Filing: 1953-10-23
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Granted: 1955-02-08
•
Expires: 1973-10-23
Abstract
No abstract record available.
Inventors
- 👤 Sylvan R Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:18
CPC Classifications
F; F04; F04C; F04C29/00; F04C29/02; F04B; F04B39/00; F04B39/06; F04B39/16; F25; F25B; F25B43/00; F25B43/02; F04C27/00; F04C27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2234777A
Cited
US2570134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-07 | 1958-08-09 | 1959-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-07 | 1962-08-09 | 1963-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-07 | 1966-08-09 | 1967-02-08 | $7700.00 | Window Closed / Lapsed |