US3049809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of drying filamentary material
Assignee: Wyeth Holdings LLC
•
Filing: 1959-09-18
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Granted: 1962-08-21
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Expires: 1979-09-18
Abstract
No abstract record available.
Inventors
- 👤 William N Sellers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:58
CPC Classifications
D; D06; D06C; D06C7/00; D06C2700/00; D06C2700/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A METHOD OF CONTINUOUSLY DRYING CONTINUOUS, UNFABRICATED, WET-SPUN, GELLED, FILAMENTARY MATERIAL IN UNTENSIONED STATE COMPRISED OF A POLYMER OF ACYLONTRILE, SAID METHOD COMPRISING CONTINUOUSLY PASSING SAID FILAMENTARY MATERIAL ALTERNATELY OVER AND UNDER HEATED, CYLINDRICAL SURFACES ARRANGED IN SREIES IN A HEAT-INSULATED
Claim 2
Independent Claim
41 words
A METHOD OF CONTINUOUSLY DRYING CONTINUOUS, UNFABRICATED, WET-SPUN, GELLED, FILAMENTARY MATERIAL IN UNTENSIONED STATE COMPRISED OF A POLYMER OF ACYLONTRILE, SAID METHOD COMPRISING CONTINUOUSLY PASSING SAID FILAMENTARY MATERIAL ALTERNATELY OVER AND UNDER HEATED, CYLINDRICAL SURFACES ARRANGED IN SREIES IN A HEAT-INSULATED
References Cited (Backward Citations)
US2260501A
Cited
US2344686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-20 | 1966-02-19 | 1966-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-20 | 1970-02-19 | 1970-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-20 | 1974-02-19 | 1974-08-21 | $7700.00 | Window Closed / Lapsed |