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US2765136A
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Assignee: Knapp Mills Inc
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Filing: 1951-05-03
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Granted: 1956-10-02
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Expires: 1971-05-03
Abstract
No abstract record available.
Inventors
- 👤 Alfred P Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:04
CPC Classifications
F; F16; F16L; F16L3/00; F16L3/22; F16L3/223; F16L3/227; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7062; Y10T403/7064; Y10T403/7066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US141498A
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US715561A
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US726905A
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US1377355A
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US1852363A
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US1725809A
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GB319880A
Cited
US1822905A
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US2216886A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |