Patent US2911984A successfully refreshed from Google Patents.
US2911984A
Expired / Lapsed
US
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Holders and filters for tobacco smoking
Assignee: Aquafilter Corp
•
Filing: 1954-09-21
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Granted: 1959-11-10
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Expires: 1974-09-21
Abstract
No abstract record available.
Inventors
- 👤 Gerard Merwin
- 👤 Lester Seeleg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:46
CPC Classifications
A; A24; A24F; A24F13/00; A24F13/02; A24F13/04; A24F13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1418113A
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US1961866A
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US2171770A
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US2220449A
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US2269323A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |