Patent US1876204A successfully refreshed from Google Patents.
Patent US2722733A successfully refreshed from Google Patents.
US2722733A
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Method of making heat exchanger tube
Assignee: Cleaver Brooks Co
•
Filing: 1950-11-08
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Granted: 1955-11-08
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Expires: 1970-11-08
Abstract
No abstract record available.
Inventors
- 👤 James R Meyer
- 👤 Frederick A Loebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:36
CPC Classifications
B; B21; B21C; B21C1/00; B21C1/16; B21C1/22; B21C37/00; B21C37/06; B21C37/15; B21C37/151; B21D; B21D53/00; B21D53/02; B21D53/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49361; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49929
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1802695A
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US1878242A
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US2179530A
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US2243184A
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CH229281A
Cited
US2443295A
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US2622314A
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US2611585A
Cited
US2693026A
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US2611587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |