US2535782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for expanding tubes in tube seats
Assignee: Babcock and Wilcox Co
•
Filing: 1948-08-19
•
Granted: 1950-12-26
•
Expires: 1968-08-19
Abstract
No abstract record available.
Inventors
- 👤 Walter B Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:36
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/08; B21D39/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1615502A
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US1514712A
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US1826482A
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US2041915A
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US2324030A
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US2389098A
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US2355852A
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US2448512A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |