US1659918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion valve
Assignee: NAT REFRIGERATION CORP
•
Filing: 1924-01-12
•
Granted: 1928-02-21
•
Expires: 1944-01-12
Abstract
No abstract record available.
Inventors
- 👤 Carl E L Lipman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:07
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/30; F25B41/31; F25B41/325; F25B41/33; F25B41/335; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7809; Y10T137/782; Y10T137/7821; Y10T137/794; Y10T137/7976; Y10T137/8593; Y10T137/87265; Y10T137/8733
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-02-20 | 1931-08-22 | 1932-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-02-20 | 1935-08-22 | 1936-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-02-20 | 1939-08-22 | 1940-02-21 | $7700.00 | Window Closed / Lapsed |