US2763395A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffuser devices
Assignee: Airkem Inc
•
Filing: 1952-06-06
•
Granted: 1956-09-18
•
Expires: 1972-06-06
Abstract
No abstract record available.
Inventors
- 👤 George W Meek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:12
CPC Classifications
A; A61; A61L; A61L9/00; A61L9/015; A61L9/04; A61L2209/00; A61L2209/10; A61L2209/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US900748A
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US1015455A
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US1339067A
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FR572751A
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US1481325A
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US1680539A
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GB292205A
Cited
US1707841A
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US2229475A
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US2540758A
Cited
US2459247A
Cited
US2503276A
Cited
US2625044A
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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) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |