Patent US2712461A successfully refreshed from Google Patents.
US2712461A
Expired / Lapsed
US
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Rotary shaft seal
Assignee: Rockwell Manufacturing Co
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Filing: 1952-05-28
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Granted: 1955-07-05
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Expires: 1972-05-28
Abstract
No abstract record available.
Inventors
- 👤 George E Batchelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:50
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/38; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1958246A
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US2362854A
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US2395705A
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US2411509A
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US2405464A
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US2479711A
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US2489212A
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US2455700A
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US2575549A
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US2554595A
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US2619040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-04 | 1959-01-03 | 1959-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-04 | 1963-01-03 | 1963-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-04 | 1967-01-03 | 1967-07-05 | $7700.00 | Window Closed / Lapsed |