Patent US2400533A successfully refreshed from Google Patents.
US2400533A
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US
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Method of making ring type packings
Assignee: Lea Fabrics Inc
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Filing: 1940-06-27
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Granted: 1946-05-21
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Expires: 1960-06-27
Abstract
No abstract record available.
Inventors
- 👤 Malcolm R Buffington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:51
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/24; E; E21; E21B; E21B37/00; E21B37/10; Y; Y10; Y10S; Y10S277/00; Y10S277/924
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-05-20 | 1949-11-19 | 1950-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-05-20 | 1953-11-19 | 1954-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-05-20 | 1957-11-19 | 1958-05-21 | $7700.00 | Window Closed / Lapsed |