Patent US3022267A successfully refreshed from Google Patents.
US3022267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized isotactic polypropylene and method
Assignee: Sinclair Refining Co
•
Filing: 1958-05-14
•
Granted: 1962-02-20
•
Expires: 1978-05-14
Abstract
No abstract record available.
Inventors
- 👤 David W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:27
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF SOLID, CRYSTALLINE ISOTACTIC POLYPROPYLENE AND 0.005 TO 5 PERCENT OF N-STEAROYL P-AMINO PHENOL.
Claim 2
Dependent Claim
20 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF SOLID, CRYSTALLINE ISOTACTIC POLYPROPYLENE AND 0.005 TO 5 PERCENT OF N-STEAROYL P-AMINO PHENOL.
References Cited (Backward Citations)
US2654722A
Cited
US2705227A
Cited
US2824089A
Cited
US2843577A
Cited
US2908670A
Cited
US2957849A
Cited
US2939860A
Cited
US2921048A
Cited
US2925400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |