Patent US2199489A successfully refreshed from Google Patents.
US2199489A
Expired / Lapsed
US
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Spring and air cushion
Assignee: Stubnitz Greene Spring Corp
•
Filing: 1938-08-08
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Granted: 1940-05-07
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Expires: 1958-08-08
Abstract
No abstract record available.
Inventors
- 👤 Daniel A Greene
- 👤 John M Caughey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:15
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-05-07 | 1943-11-06 | 1944-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-05-07 | 1947-11-06 | 1948-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-05-07 | 1951-11-06 | 1952-05-07 | $7700.00 | Window Closed / Lapsed |