US2573151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant expansion valve
Assignee: Sporlan Valve Co
•
Filing: 1947-10-09
•
Granted: 1951-10-30
•
Expires: 1967-10-09
Abstract
No abstract record available.
Inventors
- 👤 Harold T Lange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:29
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/30; F25B41/31; F25B41/33; F25B41/335
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1521985A
Cited
US2037949A
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US2242334A
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US2221633A
Cited
US2243355A
Cited
US2309405A
Cited
US2355043A
Cited
US2368592A
Cited
US2385243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |