US2359900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making car springs
Assignee: FROST RAILWAY SUPPLY CO
•
Filing: 1941-08-21
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Granted: 1944-10-10
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Expires: 1961-08-21
Abstract
No abstract record available.
Inventors
- 👤 Louis E Endsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:28
CPC Classifications
B; B21; B21K; B21K7/00; B21K7/12; B21D; B21D11/00; B21D11/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609; Y10T29/49611
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) | 1947-10-10 | 1948-04-10 | 1948-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-10-10 | 1952-04-10 | 1952-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-10-10 | 1956-04-10 | 1956-10-10 | $7700.00 | Window Closed / Lapsed |