US2420040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft oil seal
Assignee: RAMSEY ACCESSORIES MANUFACTURING Corp
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Filing: 1945-07-13
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Granted: 1947-05-06
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Expires: 1965-07-13
Abstract
No abstract record available.
Inventors
- 👤 Frank D Frisby
- 👤 Melvin W Marien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:02
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/3456; F16J15/3464; F16J15/348; F16J15/3484; Y; Y10; Y10S; Y10S277/00; Y10S277/928
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-05 | 1950-11-04 | 1951-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-05 | 1954-11-04 | 1955-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-05 | 1958-11-04 | 1959-05-06 | $7700.00 | Window Closed / Lapsed |