Patent US2729192A successfully refreshed from Google Patents.
US2729192A
Expired / Lapsed
US
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Doctor blade for paper coating apparatus
Assignee: Champion Paper and Fibre Co
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Filing: 1952-12-31
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Granted: 1956-01-03
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Expires: 1972-12-31
Abstract
No abstract record available.
Inventors
- 👤 Warner Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:01
CPC Classifications
D; D21; D21H; D21H25/00; D21H25/08; D21H25/12; D21H5/00; D21H5/0005; D21H5/006; D21H5/0062; D21H5/0067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1968911A
Cited
US2136739A
Cited
US2334102A
Cited
US2368176A
Cited
US2534321A
Cited
US2598733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |