US3848044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cured phenol-formaldehyde fibers and method for the production thereof
Assignee: Toray Industries Inc
•
Filing: 1971-09-30
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Granted: 1974-11-12
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Expires: 1991-09-30
Abstract
Abstract 1. THE PROCESS FOR THE MANUFACTURE OF A CURED CROSSLINKED FIBER FROM A PHENOL-FORMADEHYDE REIN COMPRISING MELT SPINNING A RESIN COMPOSITION COMPRISED OF A CURABLE NOVOLAC RESIN HAVING A PH OF AT LEAST 4 AND A MELT VISCOSITY OF 300-5,000 POISE AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF TETRAOXYMETHYLENE, TRIOXANE AND MIXTURE THEREOF AND CURING THE OBTAINED UNCURED REISN FIBER IN THE PRESENCE OF AN ACID CATALYST TO PROVIDE SAID CURED FIBER.
Inventors
- 👤 Y Hagiwara
- 👤 K Sato
- 👤 N Yoshizumi
- 👤 K Nagai
- 👤 H Komatsu
- 👤 S Yuguchi
- 👤 H Takeda
- 👤 S Ohnishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:55
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/76; D01D; D01D5/00; D01D5/08; D01D5/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE PROCESS FOR THE MANUFACTURE OF A CURED CROSSLINKED FIBER FROM A PHENOL-FORMADEHYDE REIN COMPRISING MELT SPINNING A RESIN COMPOSITION COMPRISED OF A CURABLE NOVOLAC RESIN HAVING A PH OF AT LEAST 4 AND A MELT VISCOSITY OF 300-5,000 POISE AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF TETRAOXYMETHYLENE, TRIOXANE AND MIXTURE THEREOF AND CURING THE OBTAINED UNCURED REISN FIBER IN THE PRESENCE OF AN ACID CATALYST TO PROVIDE SAID CURED FIBER.
Claim 2
Dependent Claim
73 words
THE PROCESS FOR THE MANUFACTURE OF A CURED CROSSLINKED FIBER FROM A PHENOL-FORMADEHYDE REIN COMPRISING MELT SPINNING A RESIN COMPOSITION COMPRISED OF A CURABLE NOVOLAC RESIN HAVING A PH OF AT LEAST 4 AND A MELT VISCOSITY OF 300-5,000 POISE AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF TETRAOXYMETHYLENE, TRIOXANE AND MIXTURE THEREOF AND CURING THE OBTAINED UNCURED REISN FIBER IN THE PRESENCE OF AN ACID CATALYST TO PROVIDE SAID CURED FIBER.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |