US2978241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low stiffness spring units
Assignee: Rose Brothers Gainsborough Ltd
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Filing: 1959-06-22
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Granted: 1961-04-04
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Expires: 1979-06-22
Abstract
No abstract record available.
Inventors
- 👤 Plastow Ronald James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:03
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/02; F16F15/04; F16F15/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |