US2780987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wood flour press-method, apparatus, and product
Assignee: PORTCO CORP
•
Filing: 1953-01-12
•
Granted: 1957-02-12
•
Expires: 1973-01-12
Abstract
No abstract record available.
Inventors
- 👤 Howard M Wall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:58
CPC Classifications
B; B30; B30B; B30B9/00; B30B9/30; B30B9/3003; B30B9/3007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US963955A
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US764926A
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US994349A
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US1468130A
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US1625066A
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US2043366A
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US2367103A
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US2571618A
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US2575672A
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US2593569A
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US2682139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-12 | 1960-08-13 | 1961-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-12 | 1964-08-13 | 1965-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-12 | 1968-08-13 | 1969-02-12 | $7700.00 | Window Closed / Lapsed |