Patent US2808976A successfully refreshed from Google Patents.
Patent US2201024A successfully refreshed from Google Patents.
US2201024A
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Method of making heat transfer pipe
Assignee: Individual
•
Filing: 1938-06-07
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Granted: 1940-05-14
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Expires: 1958-06-07
Abstract
No abstract record available.
Inventors
- 👤 Jr John W Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:13
CPC Classifications
B; B22; B22D; B22D19/00; B22D19/0063; F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/24; F28F1/30; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-05-14 | 1943-11-13 | 1944-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-05-14 | 1947-11-13 | 1948-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-05-14 | 1951-11-13 | 1952-05-14 | $7700.00 | Window Closed / Lapsed |