Patent US668720A successfully refreshed from Google Patents.
US668720A
Expired / Lapsed
US
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Joint.
Assignee: Individual
•
Filing: 1899-03-03
•
Granted: 1901-02-26
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Expires: 1919-03-03
Abstract
No abstract record available.
Inventors
- 👤 Fredrick H E Siegmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:33
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/38; E04B1/58; E04B1/5825; E04B1/5837; E04B1/585; B; B23; B23K; B23K20/00; B23K20/12; B23K20/122; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49623; Y10T29/49625; Y10T29/49627
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) | 1904-02-26 | 1904-08-27 | 1905-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-02-26 | 1908-08-27 | 1909-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-02-26 | 1912-08-27 | 1913-02-26 | $7700.00 | Window Closed / Lapsed |