Patent US2579818A successfully refreshed from Google Patents.
US2579818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring assembly
Assignee: Individual
•
Filing: 1945-04-14
•
Granted: 1951-12-25
•
Expires: 1965-04-14
Abstract
No abstract record available.
Inventors
- 👤 Goldstein Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:46
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/04; A47C23/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US426022A
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US1395421A
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US902011A
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US1633544A
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US1695444A
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US1948130A
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US2008185A
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US2052040A
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US2261581A
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US2265426A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |