Patent US2520526A successfully refreshed from Google Patents.
US2520526A
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US
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Assignee: Hartford National Bank and Trust Co
•
Filing: 1946-07-10
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Granted: 1950-08-29
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Expires: 1966-07-10
Abstract
No abstract record available.
Inventors
- 👤 Brouwer Pieter Hendri Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:47
CPC Classifications
B; B65; B65G; B65G23/00; B65G23/02; B65G23/04; H; H01; H01H; H01H1/00; H01H1/12; H01H1/14; H01H1/24; H01H1/26; H01H1/28; H01H50/00; H01H50/54; H01H50/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1969926A
Cited
US2077091A
Cited
DE645956C
Cited
US2134448A
Cited
US2282687A
Cited
US2238458A
Cited
US2279811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |