US3151012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making edge reinforced tubes used in forming reinforced fiber drums
Assignee: Continental Can Co Inc
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Filing: 1960-12-06
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Granted: 1964-09-29
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Expires: 1980-12-06
Abstract
No abstract record available.
Inventors
- 👤 Harold A Bergstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:11
CPC Classifications
B; B65; B65D; B65D15/00; B65D15/02; B65D15/04; B29; B29C; B29C63/00; B29C63/26; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/109; Y10T156/1092; Y10T156/1097
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A METHOD OF REINFORCING EDGES OF A CONVOLUTED FIBER TUBE FOR USE IN A CYLINDRICAL FIBER DRUM COMPRISING THE STEPS OF FIRST SECURING ON A CONTINUOUS LENGTH OF STOCK MATERIAL A PAIR OF STRIPS OF THIN GAGE SHEET METAL PARALLEL TO THE OPPOSITE SIDE EDGES OF THE STOCK MATERIAL AND THEREAFTER CONVOLUTELY WINDING SAID STOCK MATERIAL ON A WINDING MANDREL FORMING AT LEAST ONE INNER AND OUTER PLY WITH SAID STRIPS OF METAL FORMING A CIRCUMFERENTIAL PARTIAL PLY AT THE UPPER AND LOWER ENDS OF THE CONVOLUTED TUBE.
Claim 2
Independent Claim
88 words
A METHOD OF REINFORCING EDGES OF A CONVOLUTED FIBER TUBE FOR USE IN A CYLINDRICAL FIBER DRUM COMPRISING THE STEPS OF FIRST SECURING ON A CONTINUOUS LENGTH OF STOCK MATERIAL A PAIR OF STRIPS OF THIN GAGE SHEET METAL PARALLEL TO THE OPPOSITE SIDE EDGES OF THE STOCK MATERIAL AND THEREAFTER CONVOLUTELY WINDING SAID STOCK MATERIAL ON A WINDING MANDREL FORMING AT LEAST ONE INNER AND OUTER PLY WITH SAID STRIPS OF METAL FORMING A CIRCUMFERENTIAL PARTIAL PLY AT THE UPPER AND LOWER ENDS OF THE CONVOLUTED 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) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |