Patent US2331427A successfully refreshed from Google Patents.
Patent US742821A successfully refreshed from Google Patents.
US742821A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal cylinder.
Assignee: Westinghouse Machine Co
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Filing: 1902-12-29
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Granted: 1903-11-03
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Expires: 1922-12-29
Abstract
No abstract record available.
Inventors
- 👤 Edwin E Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:25
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/001; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/06
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) | 1906-11-02 | 1907-05-04 | 1907-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1910-11-02 | 1911-05-04 | 1911-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1914-11-02 | 1915-05-04 | 1915-11-03 | $7700.00 | Window Closed / Lapsed |