US3411179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruder screw mixing section
Assignee: Leesona Corp
•
Filing: 1966-04-12
•
Granted: 1968-11-19
•
Expires: 1986-04-12
Abstract
No abstract record available.
Inventors
- 👤 Robert B Gregory
- 👤 Louis F Street
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:55
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/505; B29C48/67; B29C48/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3123860A
Cited
US2511203A
Cited
GB964428A
Cited
US3271819A
Cited
US3184790A
Cited
US3296659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |