US2934142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for feeding substantially gas-free paper pulp into a paper making machine
Assignee: Valmet Technologies Oy
•
Filing: 1955-11-02
•
Granted: 1960-04-26
•
Expires: 1975-11-02
Abstract
No abstract record available.
Inventors
- 👤 Ikavalko Erkki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:11
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1421981A
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GB469229A
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US2280632A
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US2255951A
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US2381286A
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US2550552A
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US2677991A
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US2563790A
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US2664033A
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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) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |