US3388037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method in the manufacture of wood pulp from chips in grinding apparatus in two stages
Assignee: Valmet AB
•
Filing: 1964-05-28
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Granted: 1968-06-11
•
Expires: 1984-05-28
Abstract
No abstract record available.
Inventors
- 👤 Asplund Arne Johan Arthur
- 👤 Cederquist Karl Nicolaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:31
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/12; D21B1/14; D21B1/16; D21D; D21D1/00; D21D1/20; D21D1/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1711706A
Cited
US1870650A
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US2454532A
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US2957795A
Cited
US2960161A
Cited
US3023140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |