US1684141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Perkins Machine & Gear Co
•
Filing: 1927-06-11
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Granted: 1928-09-11
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Expires: 1947-06-11
Abstract
No abstract record available.
Inventors
- 👤 Julian L Perkins
- 👤 Hiram D Croft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:00
CPC Classifications
B; B23; B23G; B23G7/00; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/304536; Y10T409/305544; Y10T409/3056; Y10T409/30868; Y10T409/308792; Y10T409/308848
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) | 1931-09-11 | 1932-03-12 | 1932-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-09-11 | 1936-03-12 | 1936-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-09-11 | 1940-03-12 | 1940-09-11 | $7700.00 | Window Closed / Lapsed |