Patent US3520093A successfully refreshed from Google Patents.
US3520093A
Expired / Lapsed
US
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Cover for roof ventilator
Assignee: Jenn Air Corp
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Filing: 1969-07-10
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Granted: 1970-07-14
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Expires: 1989-07-10
Abstract
No abstract record available.
Inventors
- 👤 Phillip Painter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:41
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/03; E04D13/0325; F; F24; F24F; F24F7/00; F24F7/02; F24F7/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US230952A
Cited
US2987983A
Cited
US3093059A
Cited
US3238862A
Cited
US3302551A
Cited
US3340656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |