US2291455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making balance wheels
Assignee: Waltham Watch Co
•
Filing: 1939-08-10
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Granted: 1942-07-28
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Expires: 1959-08-10
Abstract
No abstract record available.
Inventors
- 👤 Dumaine Pierre
- 👤 Arthur P Emmert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:29
CPC Classifications
G; G04; G04B; G04B17/00; G04B17/04; G04B17/06; G04D; G04D3/00; G04D3/0002; G04D3/0035; G04D3/0038; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49481; Y10T29/49579; Y10T29/49581
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) | 1945-07-27 | 1946-01-26 | 1946-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-27 | 1950-01-26 | 1950-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-27 | 1954-01-26 | 1954-07-28 | $7700.00 | Window Closed / Lapsed |