US2452441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulator valve having a capillary tube expansion passage
Assignee: Alco Valve Co
•
Filing: 1944-06-17
•
Granted: 1948-10-26
•
Expires: 1964-06-17
Abstract
No abstract record available.
Inventors
- 👤 John E Dube
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:39
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/30; F25B41/31; F25B41/33; F25B41/335; F25B2341/00; F25B2341/06; F25B2341/062; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US212408A
Cited
US616197A
Cited
US995402A
Cited
US1066213A
Cited
US1223299A
Cited
US1289512A
Cited
US1666283A
Cited
US1935181A
Cited
US1803074A
Cited
US1890494A
Cited
US2068858A
Cited
US2271833A
Cited
US2326093A
Cited
US2309405A
Cited
US2337862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-26 | 1952-04-26 | 1952-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-26 | 1956-04-26 | 1956-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-26 | 1960-04-26 | 1960-10-26 | $7700.00 | Window Closed / Lapsed |