Patent US3408914A successfully refreshed from Google Patents.
US3408914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fumehood with auxiliary air supply and by-pass conduit means
Assignee: Individual
•
Filing: 1967-02-06
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Granted: 1968-11-05
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Expires: 1987-02-06
Abstract
No abstract record available.
Inventors
- 👤 Bayern Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:45
CPC Classifications
B; B08; B08B; B08B15/00; B08B15/02; B08B15/023; B08B2215/00; B08B2215/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |