Patent US2710648A successfully refreshed from Google Patents.
US2710648A
Expired / Lapsed
US
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Spring frame construction
Assignee: No Sag Spring Co
•
Filing: 1948-07-15
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Granted: 1955-06-14
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Expires: 1968-07-15
Abstract
No abstract record available.
Inventors
- 👤 Mouw Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:32
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/12; A47C23/16
Claims Analysis
Total Claims: 0
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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) | 1958-06-13 | 1958-12-13 | 1959-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-13 | 1962-12-13 | 1963-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-13 | 1966-12-13 | 1967-06-14 | $7700.00 | Window Closed / Lapsed |