Patent US3055538A successfully refreshed from Google Patents.
US3055538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure vessel seal
Assignee: Babcock and Wilcox Co
•
Filing: 1958-01-30
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Granted: 1962-09-25
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Expires: 1978-01-30
Abstract
No abstract record available.
Inventors
- 👤 Earl E Schoessow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:44
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/14; B; B01; B01J; B01J3/00; B01J3/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1165210A
Cited
US1902494A
Cited
US1926107A
Cited
US2460054A
Cited
US2492409A
Cited
US2711266A
Cited
US2760673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |