US2630853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retractive roller expander
Assignee: Babcock and Wilcox Co
•
Filing: 1950-09-22
•
Granted: 1953-03-10
•
Expires: 1970-09-22
Abstract
No abstract record available.
Inventors
- 👤 John E Toth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:39
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/08; B21D39/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US426044A
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US483920A
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DE441523C
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GB189604715A
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US771889A
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US831720A
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US941190A
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US1439622A
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US1514712A
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US1752408A
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US2375235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |