US2529573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil metering device for sewing machines
Assignee: Singer Co
•
Filing: 1947-11-12
•
Granted: 1950-11-14
•
Expires: 1967-11-12
Abstract
No abstract record available.
Inventors
- 👤 Ritter Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:26
CPC Classifications
D; D05; D05B; D05B71/00; D05B71/02; F; F16; F16N; F16N27/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1817650A
Cited
US2284474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |