Patent US3930490A successfully refreshed from Google Patents.
Patent US2717540A successfully refreshed from Google Patents.
US2717540A
Expired / Lapsed
US
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Sealing ribs for the suction boxes of paper machines
Assignee: Individual
•
Filing: 1952-08-21
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Granted: 1955-09-13
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Expires: 1972-08-21
Abstract
No abstract record available.
Inventors
- 👤 Planer Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:00
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/48; D21F1/52; D21F1/523; Y; Y10; Y10S; Y10S277/00; Y10S277/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE288574C
Cited
FR421020A
Cited
US1353941A
Cited
US1666234A
Cited
GB298671A
Cited
US1677128A
Cited
US1844641A
Cited
US1881105A
Cited
US2578551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-12 | 1959-03-14 | 1959-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-12 | 1963-03-14 | 1963-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-12 | 1967-03-14 | 1967-09-13 | $7700.00 | Window Closed / Lapsed |