Patent US2423241A successfully refreshed from Google Patents.
US2423241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air distributing duct, including a damper means
Assignee: Anemostat Corp of America
•
Filing: 1943-06-05
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Granted: 1947-07-01
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Expires: 1963-06-05
Abstract
No abstract record available.
Inventors
- 👤 Franz J Kurth
- 👤 Herbert K Kunen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:02
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/12; F24F13/02; F24F13/06; F24F2013/0608
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-30 | 1950-12-30 | 1951-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-30 | 1954-12-30 | 1955-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-30 | 1958-12-30 | 1959-07-01 | $7700.00 | Window Closed / Lapsed |