Patent US3053971A successfully refreshed from Google Patents.
US3053971A
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US
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Method of and apparatus for manufacturing helically finned tubing
Assignee: Individual
•
Filing: 1960-01-07
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Granted: 1962-09-11
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Expires: 1980-01-07
Abstract
No abstract record available.
Inventors
- 👤 Busse Ferdinand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:02
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/08; B23K11/082; B23K11/084; F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/34; F28F1/36; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/49382
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1902469A
Cited
US2021477A
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US2174928A
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US2344790A
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US2747064A
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US2821619A
Cited
FR1188690A
Cited
US2886691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |