Patent US2804007A successfully refreshed from Google Patents.
US2804007A
Expired / Lapsed
US
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Anti-smudging element for air outlet device
Assignee: Anemostat Corp of America
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Filing: 1951-05-25
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Granted: 1957-08-27
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Expires: 1971-05-25
Abstract
No abstract record available.
Inventors
- 👤 Franz J Kurth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:17
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190420981A
Cited
US1414209A
Cited
CH136861A
Cited
US2337280A
Cited
US2380553A
Cited
US2355294A
Cited
US2369303A
Cited
US2432289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |