Patent US1818637A successfully refreshed from Google Patents.
US1818637A
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US
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Assignee: Individual
•
Filing: 1927-12-13
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Granted: 1931-08-11
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Expires: 1947-12-13
Abstract
No abstract record available.
Inventors
- 👤 Mathez Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:16
CPC Classifications
G; G04; G04B; G04B37/00; G04B37/12; Y; Y10; Y10T; Y10T24/00; Y10T24/47; Y10T24/4718; Y10T24/4782
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) | 1934-08-10 | 1935-02-09 | 1935-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-08-10 | 1939-02-09 | 1939-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-08-10 | 1943-02-09 | 1943-08-11 | $7700.00 | Window Closed / Lapsed |