Patent US2998339A successfully refreshed from Google Patents.
US2998339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of tubes and structural shapes from metal foils
Assignee: Foil Process Corp
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Filing: 1955-12-23
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Granted: 1961-08-29
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Expires: 1975-12-23
Abstract
No abstract record available.
Inventors
- 👤 James F Barnes
- 👤 Elmer F Rebbolz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:38
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/12; B21C37/124; Y; Y10; Y10S; Y10S138/00; Y10S138/10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49826; Y10T29/49888
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE METHOD OF PRODUCING STRUCTURAL SHAPES FROM METAL FOILS, COMPRISING WINDING A PLURALITY OF SHEETS OF METAL FOIL AROUND A MANDREL WHILE ADHESIVELY UNITING SAID SHEETS TO FORM A HOLLOW TUBE, DEPOSITING AN ADHESIVE COATING ON AT LEAST PART OF THE INNER WALLS OF SAID TUBE, AND APPLYING PRESSURE TO THE OUTSIDE WALLS OF SAID TUBE IN SUCH A WAY AS TO ALTER ITS CROSS-SECTIONAL SHAPE AND TO BRING TOGETHER IN ADHESIVELY-BONDED RELATION AT LEAST PART OF THE ADHESIVE COATED INNER WALLS OF SAID TUBE.
Claim 2
Independent Claim
85 words
THE METHOD OF PRODUCING STRUCTURAL SHAPES FROM METAL FOILS, COMPRISING WINDING A PLURALITY OF SHEETS OF METAL FOIL AROUND A MANDREL WHILE ADHESIVELY UNITING SAID SHEETS TO FORM A HOLLOW TUBE, DEPOSITING AN ADHESIVE COATING ON AT LEAST PART OF THE INNER WALLS OF SAID TUBE, AND APPLYING PRESSURE TO THE OUTSIDE WALLS OF SAID TUBE IN SUCH A WAY AS TO ALTER ITS CROSS-SECTIONAL SHAPE AND TO BRING TOGETHER IN ADHESIVELY-BONDED RELATION AT LEAST PART OF THE ADHESIVE COATED INNER WALLS OF SAID TUBE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |