US2812790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of shredded wood pulp
Assignee: Hercules Powder Co
•
Filing: 1954-10-04
•
Granted: 1957-11-12
•
Expires: 1974-10-04
Abstract
No abstract record available.
Inventors
- 👤 Ii Joseph Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:18
CPC Classifications
D; D01; D01G; D01G99/00; D21; D21B; D21B1/00; D21B1/04; D21B1/06; D21B1/066; D21H; D21H11/00; D21H11/14; D21H5/00; D21H5/26; D21H5/2607; D21H5/2614
Claims Analysis
Total Claims: 0
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US2442492A
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US2710635A
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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) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |