US2708757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring assembly units and method of assembly thereof
Assignee: Nachman Corp
•
Filing: 1951-05-19
•
Granted: 1955-05-24
•
Expires: 1971-05-19
Abstract
No abstract record available.
Inventors
- 👤 George R Bellgrau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:51
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/04; A47C23/05
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US426022A
Cited
GB146692A
Cited
US1596273A
Cited
US1706889A
Cited
US1835819A
Cited
GB391118A
Cited
US2196526A
Cited
US2473706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |