Patent US3447451A successfully refreshed from Google Patents.
US3447451A
Expired / Lapsed
US
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Press cylinder for paper machines and pulp drying machine
Assignee: Valmet Montreal Inc
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Filing: 1966-06-01
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Granted: 1969-06-03
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Expires: 1986-06-01
Abstract
No abstract record available.
Inventors
- 👤 Olavi Herman Meskanen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:03
CPC Classifications
D; D21; D21F; D21F3/00; D21F3/02; D21F3/08; D21F3/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US358974A
Cited
US1793688A
Cited
US714856A
Cited
US2069448A
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US2876697A
Cited
US2798424A
Cited
US3097995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |