US3396061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke filters
Assignee: Celanese Corp
•
Filing: 1964-06-01
•
Granted: 1968-08-06
•
Expires: 1984-06-01
Abstract
No abstract record available.
Inventors
- 👤 Colin L Browne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:20
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2900988A
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US3039908A
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US2916038A
Cited
US3161557A
Cited
US2954036A
Cited
US3025861A
Cited
US3205107A
Cited
US3128680A
Cited
US3323961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |