US2469999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing head for extrusion machines
Assignee: Dow Chemical Co
•
Filing: 1945-05-30
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Granted: 1949-05-10
•
Expires: 1965-05-30
Abstract
No abstract record available.
Inventors
- 👤 Kenneth E Stober
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:42
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/68; B29C48/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1320718A
Cited
US1028131A
Cited
US1375623A
Cited
US2039162A
Cited
US2092992A
Cited
US2242364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |