Patent US2522439A successfully refreshed from Google Patents.
US2522439A
Expired / Lapsed
US
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Method of making spring bars
Assignee: FEURER BROS Inc
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Filing: 1946-07-31
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Granted: 1950-09-12
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Expires: 1966-07-31
Abstract
No abstract record available.
Inventors
- 👤 Feurer Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:21
CPC Classifications
G; G04; G04B; G04B37/00; G04B37/14; G04B37/1486; G04B37/1493; Y; Y10; Y10T; Y10T24/00; Y10T24/47; Y10T24/4718; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/4984; Y10T29/49845; Y10T29/49861
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) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |