Patent US2533742A successfully refreshed from Google Patents.
US2533742A
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US
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Ring packing and method of making the same
Assignee: Johns Manville Corp
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Filing: 1947-03-11
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Granted: 1950-12-12
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Expires: 1967-03-11
Abstract
No abstract record available.
Inventors
- 👤 Emil J Poltorak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:28
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/20; Y; Y10; Y10S; Y10S277/00; Y10S277/924; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1036; Y10T156/1051
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US414882A
Cited
GB190327562A
Cited
US1128247A
Cited
US1162384A
Cited
US1771890A
Cited
US1981782A
Cited
US2251211A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |