Patent US2438558A successfully refreshed from Google Patents.
US2438558A
Expired / Lapsed
US
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Levelling tool
Assignee: Individual
•
Filing: 1945-09-24
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Granted: 1948-03-30
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Expires: 1965-09-24
Abstract
No abstract record available.
Inventors
- 👤 St Nils Bertil Fredr Holiander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:01
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/10; B23B51/102; Y; Y10; Y10T; Y10T407/00; Y10T407/19; Y10T408/00; Y10T408/83; Y10T408/85; Y10T408/858; Y10T408/8583; Y10T408/8588; Y10T408/85884; Y10T409/00; Y10T409/30; Y10T409/306216; Y10T409/306384; Y10T82/00; Y10T82/25; Y10T82/2522
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-30 | 1951-09-29 | 1952-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-30 | 1955-09-29 | 1956-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-30 | 1959-09-29 | 1960-03-30 | $7700.00 | Window Closed / Lapsed |