Patent US2783518A successfully refreshed from Google Patents.
US2783518A
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Assignee: Boston & Lockport Block Co
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Filing: 1955-04-01
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Granted: 1957-03-05
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Expires: 1975-04-01
Abstract
No abstract record available.
Inventors
- 👤 Wilfred W Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:39
CPC Classifications
F; F16; F16B; F16B45/00; F16B45/02; F16B45/022; B; B66; B66C; B66C1/00; B66C1/10; B66C1/22; B66C1/34; B66C1/36; F16B45/024; F16B45/026
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) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |