US3524222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruder screw devolatilizing and mixing section
Assignee: Egan Machinery Co
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Filing: 1968-05-13
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Granted: 1970-08-18
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Expires: 1988-05-13
Abstract
No abstract record available.
Inventors
- 👤 Robert B Gregory
- 👤 Louis F Street
- 👤 David A Verner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:34
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/76; B29C48/765; B29C48/766; B29C48/505; B29C48/53; B29C48/59; B29C48/60; B29C48/64; B29C48/655; B29C48/03; Y; Y10; Y10S; Y10S159/00; Y10S159/35
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) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |