Patent US3082677A successfully refreshed from Google Patents.
US3082677A
Expired / Lapsed
US
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Roof ventilator
Assignee: DURA VENT CORP
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Filing: 1960-03-16
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Granted: 1963-03-26
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Expires: 1980-03-16
Abstract
No abstract record available.
Inventors
- 👤 Richard O Pease
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:43
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/02; E; E04; E04D; E04D13/00; E04D13/14; E04D13/147; E04D13/1471
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US822202A
Cited
US1354483A
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US1771167A
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DE568264C
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US2909113A
Cited
US2890642A
Cited
US3041955A
Cited
US2980008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |