Patent US3406752A successfully refreshed from Google Patents.
US3406752A
Expired / Lapsed
US
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Method of forming tube plate by electronic welding of tubes and the article formed
Assignee: FIVES PENHOET
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Filing: 1967-05-08
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Granted: 1968-10-22
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Expires: 1987-05-08
Abstract
No abstract record available.
Inventors
- 👤 Lion Rene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:01
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/04; F28F9/16; F28F9/18; F28F9/185; B; B21; B21D; B21D53/00; B21D53/02; F22; F22G; F22G3/00; F22G3/009; F28D; F28D7/00; F28D7/0041; F28F1/00; F28F1/02; F28F1/04; F28F1/045; F28F9/0219; F28F9/0221; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/40; Y10S165/427; Y10S165/435; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2268369A
Cited
US2337584A
Cited
US2396650A
Cited
GB763274A
Cited
GB908726A
Cited
FR1248568A
Cited
US3141807A
Cited
US3185815A
Cited
US3244226A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |