US3426105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions of polypropylene and a copolymer of ethylene and butene
Assignee: Union Carbide Corp
•
Filing: 1961-09-20
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Granted: 1969-02-04
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Expires: 1981-09-20
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:28
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08L23/10; C08L23/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA602151A
Cited
FR1179502A
Cited
GB830827A
Cited
US2993876A
Cited
US3036987A
Cited
US3004020A
Cited
US3086958A
Cited
US3074616A
Cited
US3254139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |