Patent US2670171A successfully refreshed from Google Patents.
US2670171A
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Assignee: MCA SALES Corp
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Filing: 1947-04-30
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Granted: 1954-02-23
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Expires: 1967-04-30
Abstract
No abstract record available.
Inventors
- 👤 Robert G Holt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:06
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/10; F16K41/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US650179A
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US674885A
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US1276715A
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US1631372A
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US2016997A
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US2048858A
Cited
US2196227A
Cited
US2360603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |