US2609191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring counterbalance
Assignee: EASTERN METALS RES CO Inc
•
Filing: 1948-02-16
•
Granted: 1952-09-02
•
Expires: 1968-02-16
Abstract
No abstract record available.
Inventors
- 👤 Edwin E Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:54
CPC Classifications
E; E05; E05D; E05D13/00; E05D13/10; E05D13/12; E05D13/1276
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US122288A
Cited
CH94867A
Cited
US1628668A
Cited
US1786444A
Cited
GB383357A
Cited
GB430457A
Cited
GB442681A
Cited
US1977546A
Cited
US2175516A
Cited
US2192101A
Cited
US2246239A
Cited
US2273644A
Cited
US2301960A
Cited
US2326470A
Cited
US2457705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |