US2680264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Venting means for chambers of rubber mixers or the like
Assignee: Farrel Birmingham Co Inc
•
Filing: 1951-03-17
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Granted: 1954-06-08
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Expires: 1971-03-17
Abstract
No abstract record available.
Inventors
- 👤 Douglas W Macleod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:05
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/02; B29B7/22; B29B7/24; B29B7/246; B29B7/06; B29B7/10; B29B7/18; B29B7/183; B29B7/248; B29B7/26; B29B7/263; B29B7/266; B29B7/74; B29B7/7476; B29B7/7495; B29B7/80; B29B7/84; B29B7/845
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1523387A
Cited
US1689990A
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US1905755A
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US2266831A
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US2351706A
Cited
US2442368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |