US3461683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure pipe for encapsulated refrigerating machine
Assignee: Danfoss AS
•
Filing: 1968-01-30
•
Granted: 1969-08-19
•
Expires: 1988-01-30
Abstract
No abstract record available.
Inventors
- 👤 Knud V Valbjorn
- 👤 Kjeld Kjeldsen
- 👤 Steinar Skog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:40
CPC Classifications
F; F25; F25B; F25B31/00; F25B31/02; Y; Y10; Y10S; Y10S417/00; Y10S417/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2010546A
Cited
US2215534A
Cited
US2651187A
Cited
US3187991A
Cited
US3187992A
Cited
US3154245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-18 | 1973-02-17 | 1973-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-18 | 1977-02-17 | 1977-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-18 | 1981-02-17 | 1981-08-19 | $7700.00 | Window Closed / Lapsed |