Patent US2716692A successfully refreshed from Google Patents.
US3537239A
Expired / Lapsed
US
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Smoke abatement device
Assignee: Individual
•
Filing: 1968-11-12
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Granted: 1970-11-03
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Expires: 1988-11-12
Abstract
No abstract record available.
Inventors
- 👤 Paul C Dunmire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:51
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/02; B01D47/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US226908A
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US1012089A
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US1062445A
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US1357140A
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US1402814A
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US2083649A
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US2430861A
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US2677601A
Cited
US2862354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |