US2731252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow distribution valves for evaporative coolers
Assignee: INTERNAT METAL PRODUCTS CO
•
Filing: 1953-12-23
•
Granted: 1956-01-17
•
Expires: 1973-12-23
Abstract
No abstract record available.
Inventors
- 👤 Goettl Gust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:26
CPC Classifications
F; F28; F28F; F28F25/00; F28F25/02; F28F25/06; B; B05; B05B; B05B1/00; B05B1/26; B05B1/262; F24; F24F; F24F6/00; F24F6/02; F24F6/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US153919A
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US915867A
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US1274867A
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US1578670A
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US2030510A
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US2453792A
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US2404479A
Cited
US2670941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |