Patent US2728591A successfully refreshed from Google Patents.
US2728591A
Expired / Lapsed
US
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Rotary mechanical seal
Assignee: Crane Packing Co
•
Filing: 1952-12-22
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Granted: 1955-12-27
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Expires: 1972-12-22
Abstract
No abstract record available.
Inventors
- 👤 Archie J Solari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:34
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/36; Y; Y10; Y10S; Y10S285/00; Y10S285/923
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22666E
Cited
DE505087C
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US2208620A
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US2378095A
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US2375985A
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US2425209A
Cited
US2463695A
Cited
US2525366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |