Patent US3464450A successfully refreshed from Google Patents.
US3464450A
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US
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Double-walled tubular body and devices for making same
Assignee: Individual
•
Filing: 1967-02-07
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Granted: 1969-09-02
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Expires: 1987-02-07
Abstract
No abstract record available.
Inventors
- 👤 Francesco Steffenini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:39
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/18; B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/11; B29C48/25; B29C48/30; B29C48/32; B29C48/33; B65; B65H; B65H75/00; B65H75/02; B65H75/04; B65H75/08; B65H75/10; B65H75/14; B65H75/18; B65H75/24; F16L9/02; F16L9/04; F16L9/12; F16L9/127; B29L; B29L2031/00; B29L2031/60; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US813918A
Cited
US1023530A
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AT85856B
Cited
US1677714A
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US2145244A
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US3110754A
Cited
US3326244A
Cited
US3332446A
Cited
US3379221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |