US1489894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making springs
Assignee: STERLING SPRING Co
•
Filing: 1921-03-21
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Granted: 1924-04-08
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Expires: 1941-03-21
Abstract
No abstract record available.
Inventors
- 👤 John C Monteith
- 👤 Lee A Frayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:42
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/88; B21D53/886; Y; Y10; Y10S; Y10S72/00; Y10S72/702; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609; Y10T29/49615
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) | 1927-04-08 | 1927-10-08 | 1928-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-04-08 | 1931-10-08 | 1932-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-04-08 | 1935-10-08 | 1936-04-08 | $7700.00 | Window Closed / Lapsed |