US2446657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicator for rubber mixers or the like
Assignee: Farrel Birmingham Co Inc
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Filing: 1947-09-26
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Granted: 1948-08-10
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Expires: 1967-09-26
Abstract
No abstract record available.
Inventors
- 👤 Douglas W Macleod
- 👤 Raymond H Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:04
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; B29B7/28; B29B7/74; B29B7/7476; B29B7/7495; Y; Y10; Y10S; Y10S91/00; Y10S91/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-10 | 1952-02-09 | 1952-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-10 | 1956-02-09 | 1956-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-10 | 1960-02-09 | 1960-08-10 | $7700.00 | Window Closed / Lapsed |