US3144420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High impact polystyrene
Assignee: Atlantic Richfield Co
•
Filing: 1961-12-18
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Granted: 1964-08-11
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Expires: 1981-12-18
Abstract
No abstract record available.
Inventors
- 👤 Charles F Fryling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:46
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F257/00; C08F257/02; C08F291/00; C08F291/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |