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US3394713A
Expired / Lapsed
US
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Cigarette filter
Assignee: Philip Morris USA Inc
•
Filing: 1965-10-24
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Granted: 1968-07-30
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Expires: 1985-10-24
Abstract
No abstract record available.
Inventors
- 👤 Richard N Thomson
- 👤 George E Inskeep
- 👤 Albert P Super
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:14
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/04; A24D3/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1554353A
Cited
US1620438A
Cited
US1619387A
Cited
GB296256A
Cited
US2100988A
Cited
US2126545A
Cited
US3062220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |