US3028864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and devices for filtering tobacco smoke
Assignee: IBC RES LAB Inc
•
Filing: 1959-04-07
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Granted: 1962-04-10
•
Expires: 1979-04-07
Abstract
No abstract record available.
Inventors
- 👤 Wallace L Minto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:27
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/04; A24D3/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2132539A
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US2381455A
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US2669995A
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US2639972A
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US2594777A
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US2640158A
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US2804874A
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US2916038A
Cited
US2933151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |