US2992679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vented extruder structure for removing volatiles from solid polymer
Assignee: Standard Oil Co
•
Filing: 1958-12-15
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Granted: 1961-07-18
•
Expires: 1978-12-15
Abstract
No abstract record available.
Inventors
- 👤 Warren W Twaddle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:25
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/76; B29C48/765; B29C48/766; B29C48/767; B29C48/395; B29C48/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2615199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |