Patent US3408713A successfully refreshed from Google Patents.
US3408713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of filter tow
Assignee: Celanese Canada Inc
•
Filing: 1966-01-24
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Granted: 1968-11-05
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Expires: 1986-01-24
Abstract
No abstract record available.
Inventors
- 👤 Frank A Parker
- 👤 Killoran Irene Agnes Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:24
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02; A24D3/0229; A24D3/0237; A24D3/0204; D; D02; D02G; D02G1/00; D02G1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2878547A
Cited
US2970364A
Cited
US3044145A
Cited
US3120689A
Cited
US3123889A
Cited
US3341911A
Cited
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 |