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US2772872A
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Assignee: Blaw Knox Co
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Filing: 1951-12-19
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Granted: 1956-12-04
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Expires: 1971-12-19
Abstract
No abstract record available.
Inventors
- 👤 Nathaniel B Ornitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:13
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/562; C21D9/563; F; F27; F27D; F27D3/00; F27D3/02; F27D3/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US669765A
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US1657212A
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US1783465A
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US1923772A
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US1998627A
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US2020219A
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US2156395A
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US2263439A
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US2428344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |