Patent US2652244A successfully refreshed from Google Patents.
US2652244A
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Spring package
Assignee: Standard Car Truck Co
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Filing: 1949-08-06
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Granted: 1953-09-15
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Expires: 1969-08-06
Abstract
No abstract record available.
Inventors
- 👤 Gust J Christenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:54
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/12; B61F5/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US730688A
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US1932811A
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US2130674A
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US2198261A
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US2190996A
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US2278012A
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US2444337A
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US2404475A
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US2481030A
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US2481575A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |