US2515201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear pump for metering and extruding hot organic thermoplastics
Assignee: Dow Chemical Co
•
Filing: 1948-05-27
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Granted: 1950-07-18
•
Expires: 1968-05-27
Abstract
No abstract record available.
Inventors
- 👤 Frederick E Dulmage
- 👤 Grant W Cheney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:04
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/082; F04C2/084; B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/365; B29C48/37; B29C48/78; B29C48/80; B29C48/83; B29C48/832; B29C48/03; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 0
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US2090404A
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US2371916A
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US2362106A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |