US2921749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow diversion devices for frusto conical engines
Assignee: National Container Corp
•
Filing: 1955-09-29
•
Granted: 1960-01-19
•
Expires: 1975-09-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Carl W Brink
- 👤 Jr Walter Bascome Hobbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:56
CPC Classifications
B; B02; B02C; B02C2/00; B02C2/10; B02C18/00; B02C18/06; B02C18/14; B02C18/141; D; D21; D21D; D21D1/00; D21D1/20; D21D1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US76270A
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US282098A
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US864359A
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US933582A
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US984664A
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US1152690A
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US1166310A
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US1583771A
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US2120697A
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US2197182A
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US2222073A
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US2409453A
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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) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |