US2643141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft sealing device for pumps, compressors, and similar apparatus
Assignee: Dresser Industries Inc
•
Filing: 1950-09-28
•
Granted: 1953-06-23
•
Expires: 1970-09-28
Abstract
No abstract record available.
Inventors
- 👤 Lorton W Bryant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:21
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/002; F16J15/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE310371C
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US1114238A
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AT76126B
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US1521226A
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US2089773A
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US2133304A
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US2404816A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |