US2539062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostatic expansion valve
Assignee: DCTROIT LUBRICATOR Co
•
Filing: 1945-04-05
•
Granted: 1951-01-23
•
Expires: 1965-04-05
Abstract
No abstract record available.
Inventors
- 👤 Earnest J Dillman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:03
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/30; F25B41/31; F25B41/33; F25B41/335; F25B2341/00; F25B2341/06; F25B2341/068; F25B2341/0683
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US971788A
Cited
US1719075A
Cited
US1719074A
Cited
GB324957A
Cited
GB335208A
Cited
US1813168A
Cited
US2280425A
Cited
US2353240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |