Patent US2641309A successfully refreshed from Google Patents.
US2641309A
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US
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Torsion spring supported pedestal seat mounting
Assignee: Bostrom Manufacturing Co
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Filing: 1949-09-15
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Granted: 1953-06-09
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Expires: 1969-09-15
Abstract
No abstract record available.
Inventors
- 👤 Harold W Bostrom
- 👤 Frank A Grabarczyk
- 👤 Ferdinand E Svanoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:47
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/50; B60N2/502; B60N2/506; B60N2/508; B60N2/54; B60N2/548
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2460596A
Cited
GB191025944A
Cited
US1278730A
Cited
US2049550A
Cited
FR772751A
Cited
US2404722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |