US3850901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl alcohol fibers
Assignee: Individual
•
Filing: 1972-11-07
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Granted: 1974-11-26
•
Expires: 1992-11-07
Abstract
Abstract 1. POLYVINYL ALCOHOL FIBERS COMPRISING AN ESSENTIALLY WATER ISOLUBLE POLYVINYL ALCOHOL HAVING AN AVERAGE DEGREE OF POLYMERIIZATION OF FROM ABOUT 1200 TO 3500 AND CONTAINING A RESIDUE OF BORIC ACID OR A WATER SOLUBLE BORATE SALT THEREOF IN AN AMOUNT OF FROM 0.2 TO 0.9% BY WEIGHT OF POLYVINYL ALCOHOL, SAID FIBERS BEING CHARACTERIZED BY A HALF-WIDTH OF (100) RELFACTION (B) OF 0.98 TO 1.40 AND AN IM/I30 OF FROM 0.40 TO 0.48 DERIVED FROM THE AZIMUTHAL X-RAY INTENSITY DISTRIBUTION AT THE ANGLE OF DIFFRACTION OF 19.2*.
Inventors
- 👤 S Tanaka
- 👤 S Kousaka
- 👤 T Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:52
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/14; D01F1/00; D01F1/02; D01F1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
POLYVINYL ALCOHOL FIBERS COMPRISING AN ESSENTIALLY WATER ISOLUBLE POLYVINYL ALCOHOL HAVING AN AVERAGE DEGREE OF POLYMERIIZATION OF FROM ABOUT 1200 TO 3500 AND CONTAINING A RESIDUE OF BORIC ACID OR A WATER SOLUBLE BORATE SALT THEREOF IN AN AMOUNT OF FROM 0.2 TO 0.9% BY WEIGHT OF POLYVINYL ALCOHOL, SAID FIBERS BEING CHARACTERIZED BY A HALF-WIDTH OF (100) RELFACTION (B) OF 0.98 TO 1.40 AND AN IM/I30 OF FROM 0.40 TO 0.48 DERIVED FROM THE AZIMUTHAL X-RAY INTENSITY DISTRIBUTION AT THE ANGLE OF DIFFRACTION OF 19.2*.
Claim 2
Dependent Claim
86 words
POLYVINYL ALCOHOL FIBERS COMPRISING AN ESSENTIALLY WATER ISOLUBLE POLYVINYL ALCOHOL HAVING AN AVERAGE DEGREE OF POLYMERIIZATION OF FROM ABOUT 1200 TO 3500 AND CONTAINING A RESIDUE OF BORIC ACID OR A WATER SOLUBLE BORATE SALT THEREOF IN AN AMOUNT OF FROM 0.2 TO 0.9% BY WEIGHT OF POLYVINYL ALCOHOL, SAID FIBERS BEING CHARACTERIZED BY A HALF-WIDTH OF (100) RELFACTION (B) OF 0.98 TO 1.40 AND AN IM/I30 OF FROM 0.40 TO 0.48 DERIVED FROM THE AZIMUTHAL X-RAY INTENSITY DISTRIBUTION AT THE ANGLE OF DIFFRACTION OF 19.2*.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |