US2639440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator for water closets
Assignee: Individual
•
Filing: 1950-05-05
•
Granted: 1953-05-26
•
Expires: 1970-05-05
Abstract
No abstract record available.
Inventors
- 👤 Charles J Majauskas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:44
CPC Classifications
A; A47; A47K; A47K13/00; A47K13/24; A47K13/26; E; E03; E03D; E03D9/00; E03D9/04; E03D9/05; E03D9/052
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1111746A
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US1362290A
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US1424955A
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US1883406A
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US2047067A
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US2181017A
Cited
US2240130A
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US2227920A
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US2216008A
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US2454333A
Cited
US2449134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |