Patent US2861181A successfully refreshed from Google Patents.
US2920347A
Expired / Lapsed
US
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Sealing means for rotary pumps
Assignee: EIDP Inc
•
Filing: 1955-12-02
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Granted: 1960-01-12
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Expires: 1975-12-02
Abstract
No abstract record available.
Inventors
- 👤 Joukainen Arnold Simon
- 👤 Moroz Peter Joseph
- 👤 Sutton Edwin Clifton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:28
CPC Classifications
F; F04; F04D; F04D3/00; F04D3/02; B; B29; B29C; B29C48/00; B29C48/03; B29C48/25; B29C48/252; B29C48/254; Y; Y10; Y10S; Y10S425/00; Y10S425/243
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1770496A
Cited
US1504658A
Cited
GB559713A
Cited
US2458068A
Cited
US2457088A
Cited
US2693348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |