Patent US1570837A successfully refreshed from Google Patents.
US1570837A
Expired / Lapsed
US
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Piston
Assignee: Dow Chemical Co
•
Filing: 1924-03-18
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Granted: 1926-01-26
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Expires: 1944-03-18
Abstract
No abstract record available.
Inventors
- 👤 John E Hoy
- 👤 Norman A Best
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:01
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/02; Y; Y10; Y10S; Y10S164/00; Y10S164/08; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49249; Y10T29/49256; Y10T29/49261
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) | 1929-01-25 | 1929-07-27 | 1930-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-01-25 | 1933-07-27 | 1934-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-01-25 | 1937-07-27 | 1938-01-26 | $7700.00 | Window Closed / Lapsed |