US3250823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of polyamide, polycarbonate or polyoxymethylene resins with polyethylene-maleate graft copolymer
Assignee: WR Grace and Co
•
Filing: 1962-06-04
•
Granted: 1966-05-10
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Expires: 1982-06-04
Abstract
No abstract record available.
Inventors
- 👤 Robert J Zeitlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:20
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/06; C08F; C08F255/00; C08F255/02; C08L59/00; C08L59/02; C08L69/00; C08L77/00; C08L77/06; Y; Y10; Y10S; Y10S8/00; Y10S8/09; Y10S8/18; Y10S8/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A POLYMER COMPOSITION COMPRISING A BLEND OF (1) A HIGH MOLECULAR WEIGHT POLYMER SELECTED FROM THE GROUP CONSISTING OF A POLYCARBONAMIDE HAVING RECURRING AMIDE UNITS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN, POLYCARBONATE HAVING RECURRING CARBONATE UNITS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN AND POLYOXYMETHYLENE HAVING THE RECURRING -CH2O- UNITS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN AND (2) A GRAFT COPOLYMER OF (A) A POLYETHYLENE POLYMER HAVING A DENSITY OF AT LEAST ABOUT 0.940 AND CONTAINING AT LEAST ABOUT 90% BY WEIGHT OF ETHYLENE IN THE PLYMER CHAIN AND (!) A MALEIC ACID DIESTER OF A MONOHYDRIC ALCOHOL, THE MALEIC ACID DIESTER BEING PRESENT IN THE GRAFT COPOLYMER IN AMOUNTS OF FROM ABOUT 0.5 TO ABOUT 12% BY WEIGHT.
Claim 2
Dependent Claim
127 words
A POLYMER COMPOSITION COMPRISING A BLEND OF (1) A HIGH MOLECULAR WEIGHT POLYMER SELECTED FROM THE GROUP CONSISTING OF A POLYCARBONAMIDE HAVING RECURRING AMIDE UNITS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN, POLYCARBONATE HAVING RECURRING CARBONATE UNITS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN AND POLYOXYMETHYLENE HAVING THE RECURRING -CH2O- UNITS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN AND (2) A GRAFT COPOLYMER OF (A) A POLYETHYLENE POLYMER HAVING A DENSITY OF AT LEAST ABOUT 0.940 AND CONTAINING AT LEAST ABOUT 90% BY WEIGHT OF ETHYLENE IN THE PLYMER CHAIN AND (!) A MALEIC ACID DIESTER OF A MONOHYDRIC ALCOHOL, THE MALEIC ACID DIESTER BEING PRESENT IN THE GRAFT COPOLYMER IN AMOUNTS OF FROM ABOUT 0.5 TO ABOUT 12% BY WEIGHT.
References Cited (Backward Citations)
CA634179A
Cited
US2302332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |