US2433981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating air distributor
Assignee: Individual
•
Filing: 1944-04-22
•
Granted: 1948-01-06
•
Expires: 1964-04-22
Abstract
No abstract record available.
Inventors
- 👤 Everett S Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:11
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)
US845047A
Cited
GB191324888A
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FR621483A
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US1886313A
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GB349802A
Cited
CH160118A
Cited
US1921457A
Cited
GB377634A
Cited
GB472863A
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US2212468A
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US2350514A
Cited
US2390630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-05 | 1951-07-07 | 1952-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-05 | 1955-07-07 | 1956-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-05 | 1959-07-07 | 1960-01-06 | $7700.00 | Window Closed / Lapsed |