US2984912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Art of producing filamentary polyacrylonitrile
Assignee: Wyeth Holdings LLC
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Filing: 1958-08-14
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Granted: 1961-05-23
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Expires: 1978-08-14
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Robertson
- 👤 George K Klausner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:53
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
THE METHOD OF COLLAPSING THE STRUCTURE OF GELLED FILAMENTARY MATERIAL COMPRISED OF WATER AND A FIBERFORMABLE ACRYLONITRILE POLYMER CONTAINING A MAJOR PROPORTION BY WEIGHT OF COMBINED ACRYLONITRILE, SAID METHOD COMPRISING DRYING THE SAID FILAMENTARY MATERIAL IN A DRYING ATMOSPHERE UNDER CORRELATED CONDITIONS OF TEMPERATURE AND HUMIDITY, THE TEMPERATURE (DRY BULB) OF SAID ATMOSPHERE BEING WITHIN THE RANGE OF FROM 200*F. TO 260*F., THE MINIMUM AND MAXIMUM PERCENTAGES OF RELATIVE HUMIDITY FOR A PARTICULAR DRY-BULB TEMPERATURE BEING THOSE FALLING BETWEEN THE LINES A-A AND D-D OF THE GRAPH SHOWN IN FIG. 1 OF THE ACCOMPANYING DRAWING, AND THE SAID DRYING UNDER THE SAID TEMPERATURE AND HUMIDITY CONDITIONS BEING CONTINUED UNTIL SUBSTANTIALLY ALL OF THE WATER HAS BEEN EVOLVED FROM THE SAID FILAMENTARY MATERIAL AND ITS STRUCTURE HAS COLLAPSED.
Claim 2
Independent Claim
127 words
THE METHOD OF COLLAPSING THE STRUCTURE OF GELLED FILAMENTARY MATERIAL COMPRISED OF WATER AND A FIBERFORMABLE ACRYLONITRILE POLYMER CONTAINING A MAJOR PROPORTION BY WEIGHT OF COMBINED ACRYLONITRILE, SAID METHOD COMPRISING DRYING THE SAID FILAMENTARY MATERIAL IN A DRYING ATMOSPHERE UNDER CORRELATED CONDITIONS OF TEMPERATURE AND HUMIDITY, THE TEMPERATURE (DRY BULB) OF SAID ATMOSPHERE BEING WITHIN THE RANGE OF FROM 200*F. TO 260*F., THE MINIMUM AND MAXIMUM PERCENTAGES OF RELATIVE HUMIDITY FOR A PARTICULAR DRY-BULB TEMPERATURE BEING THOSE FALLING BETWEEN THE LINES A-A AND D-D OF THE GRAPH SHOWN IN FIG. 1 OF THE ACCOMPANYING DRAWING, AND THE SAID DRYING UNDER THE SAID TEMPERATURE AND HUMIDITY CONDITIONS BEING CONTINUED UNTIL SUBSTANTIALLY ALL OF THE WATER HAS BEEN EVOLVED FROM THE SAID FILAMENTARY MATERIAL AND ITS STRUCTURE HAS COLLAPSED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |