US2469158A
Expired / Lapsed
US
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Assignee: PENNSYLVANIA FURNACE AND IRON
•
Filing: 1944-07-19
•
Granted: 1949-05-03
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Expires: 1964-07-19
Abstract
No abstract record available.
Inventors
- 👤 Frees Joseph H De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:05
CPC Classifications
B; B60; B60G; B60G11/00; B60G11/02; B60G11/10; B60G11/107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US748512A
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US804341A
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US1480624A
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US1478123A
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US1617031A
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US1586164A
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US1605363A
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US1935957A
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DE546193C
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FR747245A
Cited
US1921665A
Cited
US1967027A
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US2127077A
Cited
US2337073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |