US3553309A
Expired / Lapsed
US
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Method for producing the tread band of flexible tread rings while in a plastic state
Assignee: Pirelli and C SpA
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Filing: 1967-10-09
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Granted: 1971-01-05
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Expires: 1987-10-09
Abstract
Abstract A METHOD OF PRODUCING AN EMBOSSED PATTERN ALONG THE PERIPHERAL BAND OF A FLEXIBLE RING IN A PLASTIC STATE, WHEREIN THE INNER SURFACE OF THE FLEXIBLE RING IS INITALLY ENGAGED BY A COLLAPSIBLE INNER RING AFTER WHICH THE OUTER SURFACE OF THE FLEXIBLE RING IS ENGAGED BY A PLURALITY OF SECTORS FORMING AN OUTER MOLD AND HAVING RADIAL PROJECTIONS ON THEIR INNER SURFACES CORRESPONDING TO THE PATTERN.
Inventors
- 👤 Antonio Pacciarini
- 👤 Dario Giletta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:33
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/0601; B29D30/0605; Y; Y10; Y10S; Y10S425/00; Y10S425/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |