Patent US4850998A successfully refreshed from Google Patents.
Patent US3467180A successfully refreshed from Google Patents.
US3467180A
Expired / Lapsed
US
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Method of making a composite heat-exchanger tube
Assignee: Individual
•
Filing: 1966-03-30
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Granted: 1969-09-16
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Expires: 1986-03-30
Abstract
No abstract record available.
Inventors
- 👤 Franco Pensotti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:50
CPC Classifications
B; B21; B21D; B21D15/00; B21D15/04; B21D15/06; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/154; B21C37/20; B21C37/205; B21C37/22; B21C37/24; F; F22; F22D; F22D1/00; F22D1/02; Y; Y10; Y10S; Y10S165/00; Y10S165/51; Y10S165/518; Y10S165/524; Y10S165/527; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/49826; Y10T29/49908; Y10T29/49909; Y10T29/49911; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US2064461A
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US2401235A
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US2858114A
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US2916816A
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GB850058A
Cited
US3100930A
Cited
US3188733A
Cited
US3206845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |