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US2726409A
Expired / Lapsed
US
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Spring assembly units
Assignee: Nachman Corp
•
Filing: 1951-09-22
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Granted: 1955-12-13
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Expires: 1971-09-22
Abstract
No abstract record available.
Inventors
- 👤 George R Bellgran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:38
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/04; A47C23/05; A47C23/0522
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US763607A
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US1000919A
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GB191113015A
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US1940853A
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US2065423A
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US2579818A
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US2540779A
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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) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |