US2615708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring support
Assignee: Grinnell Corp
•
Filing: 1951-06-02
•
Granted: 1952-10-28
•
Expires: 1971-06-02
Abstract
No abstract record available.
Inventors
- 👤 William S Rouverol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:59
CPC Classifications
F; F16; F16F; F16F3/00; F16F3/02; F16F3/04; E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/12; E05F1/1246; E05F1/1269; E05F1/1276
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1671365A
Cited
US1816164A
Cited
US1937135A
Cited
US2161334A
Cited
US2480864A
Cited
US2568149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |