US3027090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic roof ventilator control
Assignee: Individual
•
Filing: 1957-08-19
•
Granted: 1962-03-27
•
Expires: 1977-08-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Peter Zerhan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:09
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1114246A
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US1358736A
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US1833950A
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US1915149A
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US1926120A
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US2252179A
Cited
US2314003A
Cited
US2624265A
Cited
US2698570A
Cited
US2927736A
Cited
US2987256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |