US2933762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Barrel type extruders
Assignee: Dunlop Rubber Co Ltd
•
Filing: 1957-02-20
•
Granted: 1960-04-26
•
Expires: 1977-02-20
Abstract
No abstract record available.
Inventors
- 👤 Pumphrey Howard Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:05
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/361; B29C48/03; B29C48/05; B29C48/15; B29C48/285; B29C48/288; B29C48/2888
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1763136A
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US2138378A
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GB487948A
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US2147281A
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US2331139A
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US2547151A
Cited
US2661497A
Cited
US2674007A
Cited
FR1074469A
Cited
US2800683A
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US2791803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |