US2771899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve means
Assignee: Individual
•
Filing: 1953-09-16
•
Granted: 1956-11-27
•
Expires: 1973-09-16
Abstract
No abstract record available.
Inventors
- 👤 Swallert Sven Arild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:00
CPC Classifications
E; E04; E04H; E04H15/00; E04H15/20; E04H2015/201; Y; Y10; Y10T; Y10T137/00; Y10T137/3584; Y10T137/36; Y10T152/00; Y10T152/10; Y10T152/10495; Y10T152/10522; Y10T152/10576; Y10T152/10612
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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |