US1521340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic lathe
Assignee: Pratt and Whitney Co Inc
•
Filing: 1921-03-21
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Granted: 1924-12-30
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Expires: 1941-03-21
Abstract
No abstract record available.
Inventors
- 👤 Teller Spencer Jay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:06
CPC Classifications
B; B23; B23B; B23B7/00; B23B7/12; Y; Y10; Y10T; Y10T82/00; Y10T82/14; Y10T82/141; Y10T82/25; Y10T82/2514; Y10T82/2516; Y10T82/2531; Y10T82/2541; Y10T82/2543
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) | 1927-12-30 | 1928-06-30 | 1928-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-12-30 | 1932-06-30 | 1932-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-12-30 | 1936-06-30 | 1936-12-30 | $7700.00 | Window Closed / Lapsed |