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US2467559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating tubing
Assignee: —
•
Filing: —
•
Granted: 1949-04-19
•
Expires: 1966-04-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:55
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/14; F16L11/16; F16L11/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1472518A
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US147446A
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US713560A
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US1344321A
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US1774983A
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US1666365A
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US1731322A
Cited
US1863624A
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US1937069A
Cited
US1901330A
Cited
US2176762A
Cited
US2396059A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-18 | 1952-10-18 | 1953-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-18 | 1956-10-18 | 1957-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-18 | 1960-10-18 | 1961-04-19 | $7700.00 | Window Closed / Lapsed |