US2579670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic pressure transformer
Assignee: SKF AB
•
Filing: 1949-03-24
•
Granted: 1951-12-25
•
Expires: 1969-03-24
Abstract
No abstract record available.
Inventors
- 👤 Hjarpe Eric George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:14
CPC Classifications
F; F01; F01L; F01L25/00; F01L25/02; F01L25/04; F01L25/06; F01L25/066; F04; F04B; F04B9/00; F04B9/08; F04B9/10; F04B9/109; F04B9/117; F15; F15B; F15B3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1451303A
Cited
US1600384A
Cited
US2293076A
Cited
US2279364A
Cited
US2231307A
Cited
US2340929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |