US2786435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a spirally wrapped multi-layer tube
Assignee: Individual
•
Filing: 1953-06-01
•
Granted: 1957-03-26
•
Expires: 1973-06-01
Abstract
No abstract record available.
Inventors
- 👤 Floyd P Ellzey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:06
CPC Classifications
B; B21; B21D; B21D13/00; B21D13/04; B21D13/045; B21C; B21C37/00; B21C37/06; B21C37/12; B21C37/124; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49622; Y10T29/49826; Y10T29/49895; Y10T29/49901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US919001A
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US1159798A
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US1580760A
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US1659792A
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US2007970A
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US2008423A
Cited
US2155859A
Cited
US2351152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-25 | 1960-09-24 | 1961-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-25 | 1964-09-24 | 1965-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-25 | 1968-09-24 | 1969-03-26 | $7700.00 | Window Closed / Lapsed |