Patent US2415091A successfully refreshed from Google Patents.
US2415091A
Expired / Lapsed
US
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Apparatus for kneading and mixing rubber
Assignee: Individual
•
Filing: 1939-07-22
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Granted: 1947-02-04
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Expires: 1959-07-22
Abstract
No abstract record available.
Inventors
- 👤 Frei Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:27
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/42; B29B7/421; B29B7/02; B29B7/06; B29B7/10; B29B7/12; B29B7/18; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/395; B29C48/50; B29C48/501; B29C48/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US396448A
Cited
DE409577C
Cited
US692243A
Cited
GB172977A
Cited
US1354452A
Cited
DE409966C
Cited
DE397962C
Cited
US1523184A
Cited
US1925049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-03 | 1950-08-05 | 1951-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-03 | 1954-08-05 | 1955-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-03 | 1958-08-05 | 1959-02-04 | $7700.00 | Window Closed / Lapsed |