Patent US2852801A successfully refreshed from Google Patents.
US2852801A
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Assignee: CHRISTIAN F KLEINKNECHT
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Filing: 1956-08-08
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Granted: 1958-09-23
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Expires: 1976-08-08
Abstract
No abstract record available.
Inventors
- 👤 William E Doljan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:21
CPC Classifications
E; E05; E05F; E05F5/00; E05F5/06; E05F5/08; E05Y; E05Y2201/00; E05Y2201/20; E05Y2201/21; E05Y2201/212; E05Y2201/262; E05Y2201/264
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1462925A
Cited
US1983784A
Cited
GB622346A
Cited
US2462174A
Cited
US2465741A
Cited
US2767421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |