Patent US2729146A successfully refreshed from Google Patents.
US2729146A
Expired / Lapsed
US
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Impellers for pulp disintegrating machines
Assignee: Individual
•
Filing: 1952-02-27
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Granted: 1956-01-03
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Expires: 1972-02-27
Abstract
No abstract record available.
Inventors
- 👤 Wandel Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:57
CPC Classifications
D; D21; D21D; D21D1/00; D21D1/20; D21D1/32; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US998950A
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US1831567A
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US1833099A
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US2020117A
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US2216908A
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US2336798A
Cited
US2352230A
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US2411867A
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US2571772A
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 |