Patent US3270090A successfully refreshed from Google Patents.
US3270090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making graft copolymers of polyolefins and acrylic and methacrylic acid
Assignee: Dow Chemical Co
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Filing: 1963-04-22
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Granted: 1966-08-30
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Expires: 1983-04-22
Abstract
No abstract record available.
Inventors
- 👤 Robert M Nowak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:23
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02; Y; Y10; Y10S; Y10S522/00; Y10S522/911; Y10S522/912
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A METHOD FOR MAKING A GRAFT COPOLYMER WHICH COMPRISES MALAXATING AT HEAT-PLASTIFYING TEMPERATURES BETWEEN 130* AND 250*C., A NORMALLY SOLID RESINOUS THERMOPLASTIC POLYMER SELECTED FROM THE GROUP CONSISTING OF (A) HOMOPOLYMERS OF ALIPHATIC OLEFINS CONTAINING FROM 2 TO 3 CARBON ATOMS IN THE MOLECULE AND (B) COPOLYMERS OF SAID OLEFINS, WHICH POLYMER HAS BEEN IRRADIATED WITH HIGH ENERGY IONIZING RADIATION IN AN OXYGEN CONTAINING ATMOSPHERE WHILE IN THE FORM OF FINE PARTICLES NOT GREATER THAN 1000 MICRONS AND IN A FIELD HAVING AN INTENSITY OF AT LEAST 10,000 RADS PER HOUR FOR A DOSE OF FROM 0.1 TO 10 MEGARADS, WHILE CONTACTING THE HEAT-SOFTENED POLYMER WITH A MONOMER SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID.
Claim 2
Independent Claim
119 words
A METHOD FOR MAKING A GRAFT COPOLYMER WHICH COMPRISES MALAXATING AT HEAT-PLASTIFYING TEMPERATURES BETWEEN 130* AND 250*C., A NORMALLY SOLID RESINOUS THERMOPLASTIC POLYMER SELECTED FROM THE GROUP CONSISTING OF (A) HOMOPOLYMERS OF ALIPHATIC OLEFINS CONTAINING FROM 2 TO 3 CARBON ATOMS IN THE MOLECULE AND (B) COPOLYMERS OF SAID OLEFINS, WHICH POLYMER HAS BEEN IRRADIATED WITH HIGH ENERGY IONIZING RADIATION IN AN OXYGEN CONTAINING ATMOSPHERE WHILE IN THE FORM OF FINE PARTICLES NOT GREATER THAN 1000 MICRONS AND IN A FIELD HAVING AN INTENSITY OF AT LEAST 10,000 RADS PER HOUR FOR A DOSE OF FROM 0.1 TO 10 MEGARADS, WHILE CONTACTING THE HEAT-SOFTENED POLYMER WITH A MONOMER SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID.
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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |