Patent US1439491A successfully refreshed from Google Patents.
US1439491A
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Means for cooling shafts
Assignee: SINTERING MACHINERY Corp
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Filing: 1921-12-10
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Granted: 1922-12-19
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Expires: 1941-12-10
Abstract
No abstract record available.
Inventors
- 👤 Henry J Stehli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:56
CPC Classifications
F; F16; F16C; F16C37/00; F16D; F16D2300/00; F16D2300/02; F16D2300/021; F16D2300/0214; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2173; Y10T74/2185
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) | 1925-12-18 | 1926-06-19 | 1926-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-12-18 | 1930-06-19 | 1930-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-12-18 | 1934-06-19 | 1934-12-19 | $7700.00 | Window Closed / Lapsed |