US2950267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for blending polypropylene and oxygenated polypropylene
Assignee: Sunoco Inc
•
Filing: 1957-06-21
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Granted: 1960-08-23
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Expires: 1977-06-21
Abstract
No abstract record available.
Inventors
- 👤 William E Thompson
- 👤 Denton M Albright
- 👤 Archibald P Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:05
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/26; C08L23/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2554259A
Cited
US2538355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |