US3398074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing improved polyoxymethylene graft copolymers using radiation
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1965-09-27
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Granted: 1968-08-20
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Expires: 1985-09-27
Abstract
No abstract record available.
Inventors
- 👤 Eguchi Tamotsu
- 👤 Okaya Takuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:57
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/02; C08F; C08F283/00; C08F283/06; C08G2/18; C08G2/38; C08J; C08J7/00; C08J7/12; C08J7/16; C08J7/18; C08J2359/00; C08J2359/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A METHOD OF MANUFACTURING POLYOXYMETHYLENE GRAFT COPOLYMERS WHICH COMPRISES IRRADIATING A THERMALLY STABLE POLYOXYMETHYLENE COPOLYMER OF A POLYMERIZATION DEGREE OF NOT LESS THAN 500 WHICH CONTAINS FROM 0.1 TO 15 MOLAR PERCENT OF A COMONOMER HAVING CARBON-CARBON LIKAGE SELECTED FROM THE GROUP CONSISTING OF ALKYLENE OXIDES, CYCLIC FORMAL AND VINYL MONOMERS WITH FROM 10**4 TO 5 X 10**7 ROENTGENS OF IONIZING RADIATION, AND EFFECTING GRAFT COPOLYMERIZATION OF THE IRRADIATED POLYMER BY CONTACT WITH A RADIALLY POLYMERIZABLE VINYL COMPOUND WITH A GRAFT RATIO RANGING FROM 0.5 TO 200 PERCENT.
Claim 2
Independent Claim
88 words
A METHOD OF MANUFACTURING POLYOXYMETHYLENE GRAFT COPOLYMERS WHICH COMPRISES IRRADIATING A THERMALLY STABLE POLYOXYMETHYLENE COPOLYMER OF A POLYMERIZATION DEGREE OF NOT LESS THAN 500 WHICH CONTAINS FROM 0.1 TO 15 MOLAR PERCENT OF A COMONOMER HAVING CARBON-CARBON LIKAGE SELECTED FROM THE GROUP CONSISTING OF ALKYLENE OXIDES, CYCLIC FORMAL AND VINYL MONOMERS WITH FROM 10**4 TO 5 X 10**7 ROENTGENS OF IONIZING RADIATION, AND EFFECTING GRAFT COPOLYMERIZATION OF THE IRRADIATED POLYMER BY CONTACT WITH A RADIALLY POLYMERIZABLE VINYL COMPOUND WITH A GRAFT RATIO RANGING FROM 0.5 TO 200 PERCENT.
References Cited (Backward Citations)
US3027352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |