Patent US3487128A successfully refreshed from Google Patents.
US3487128A
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Blends comprising polypropylene,polyethylene,and an ethylene-propylene block copolymer
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1967-01-30
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Granted: 1969-12-30
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Expires: 1987-01-30
Abstract
No abstract record available.
Inventors
- 👤 Masao Okazaki
- 👤 Atsuo Mori
- 👤 Namihiro Toda
- 👤 Isao Hara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:33
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L2205/00; C08L2205/03; C08L2207/00; C08L2207/10; C08L2207/14; C08L23/04; C08L23/06; C08L23/14; C08L23/142; C08L23/16; C08L2314/00; C08L2314/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3262992A
Cited
US3281501A
Cited
GB958079A
Cited
US3354239A
Cited
US3256367A
Cited
GB990717A
Cited
US3378607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |