Patent US2526243A successfully refreshed from Google Patents.
US2526243A
Expired / Lapsed
US
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Air louver for heating or cooling units
Assignee: BETZ Corp
•
Filing: 1946-07-15
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Granted: 1950-10-17
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Expires: 1966-07-15
Abstract
No abstract record available.
Inventors
- 👤 Henry J Lange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:49
CPC Classifications
F; F25; F25D; F25D17/00; F25D17/04; F25D17/06; F25D17/067; Y; Y10; Y10S; Y10S165/00; Y10S165/228; Y10S165/302; Y10S165/303; Y10S165/304; Y10S165/305
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US821698A
Cited
US1853315A
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GB321820A
Cited
US1957292A
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US1920357A
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US1983549A
Cited
US1992646A
Cited
US2153120A
Cited
US2428145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |