US2880885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cushioning device
Assignee: National Malleable and Steel Castings Co
•
Filing: 1955-04-01
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Granted: 1959-04-07
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Expires: 1975-04-01
Abstract
No abstract record available.
Inventors
- 👤 Willison Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:19
CPC Classifications
B; B61; B61G; B61G9/00; B61G9/12; B61G9/14; B61G9/04; B61G9/06
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) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |