Patent US6428284B1 successfully refreshed from Google Patents.
US2665626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building ventilator
Assignee: Individual
•
Filing: 1950-06-30
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Granted: 1954-01-12
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Expires: 1970-06-30
Abstract
No abstract record available.
Inventors
- 👤 Alexander H Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:34
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/03; E04D13/0325; E04D13/035; E04D13/0358
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE80452C
Cited
US985148A
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US1219893A
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US1277404A
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US2159498A
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US2328659A
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US2517303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |