Patent US998564A successfully refreshed from Google Patents.
Patent US1856952A successfully refreshed from Google Patents.
US1856952A
Expired / Lapsed
US
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Process for working guide sleeves for spring rings
Assignee: Individual
•
Filing: 1931-01-20
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Granted: 1932-05-03
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Expires: 1951-01-20
Abstract
No abstract record available.
Inventors
- 👤 Foerster Bernhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:41
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/44; F; F16; F16B; F16B45/00; F16B45/04; F16B45/053; F16B45/057; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49588; Y10T29/49595
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) | 1935-05-03 | 1935-11-02 | 1936-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-05-03 | 1939-11-02 | 1940-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-05-03 | 1943-11-02 | 1944-05-03 | $7700.00 | Window Closed / Lapsed |