US728217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steel casting with hardened portions and process of making same.
Assignee: FALK Co
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Filing: 1902-02-13
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Granted: 1903-05-19
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Expires: 1922-02-13
Abstract
No abstract record available.
Inventors
- 👤 Herman W Falk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:08
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/001; B23K35/004; Y; Y10; Y10S; Y10S148/00; Y10S148/902; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486; Y10T428/12493; Y10T428/12639; Y10T428/12646; Y10T428/12653
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) | 1906-05-18 | 1906-11-17 | 1907-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1910-05-18 | 1910-11-17 | 1911-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1914-05-18 | 1914-11-17 | 1915-05-19 | $7700.00 | Window Closed / Lapsed |