US2354478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft seal
Assignee: Dow Chemical Co
•
Filing: 1941-05-21
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Granted: 1944-07-25
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Expires: 1961-05-21
Abstract
No abstract record available.
Inventors
- 👤 Robert C Reinhardt
- 👤 Raymor L Jones
- 👤 Lawrence N Blackhurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:04
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/36; F16J15/363; F16J15/40
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) | 1947-07-25 | 1948-01-24 | 1948-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-07-25 | 1952-01-24 | 1952-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-07-25 | 1956-01-24 | 1956-07-25 | $7700.00 | Window Closed / Lapsed |