US2665667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rodless slide valve regulating device
Assignee: Individual
•
Filing: 1950-04-14
•
Granted: 1954-01-12
•
Expires: 1970-04-14
Abstract
No abstract record available.
Inventors
- 👤 Tolkien Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:18
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/08; F15B11/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL35155C
Cited
US1723449A
Cited
US952617A
Cited
DE543667C
Cited
DE478194C
Cited
US1919402A
Cited
DE607649C
Cited
FR893002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |