US3730801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retreating of tyres
Assignee: Republic Rubber Ind Ltd
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Filing: 1971-04-26
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Granted: 1973-05-01
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Expires: 1991-04-26
Abstract
Abstract THE INVENTION PROVIDES FOR A METHOD OF THE MEANS FOR THE RETREADING OF TYRES. IN ACCORDANCE WITH THE INVENTION, A TYRE IS RETREADED BY ENCLOSING THE TYRE IN A FLEXIBLE ENVELOPE WHICH IS PERIPERALLY SLIT. THE ENVELOPE IS SEALED BY INTERFOLDING THE OVERLAPPING REGIONS OF THE ENVELOPE A PLURALITY OF TIMES WITHIN ONE ANOTHER. BY THEN PROVIDING A HIGHER FLUID PRESSURE OUTSIDE THE ENVELOPE THAN INSIDE IT, THE ENVELOPE IS FORCED AGAINST THE NEW TREAD WHICH IS THEREBY FORCED AGAINST THE TYPE CASTING. D R A W I N G
Inventors
- 👤 A Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:08
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/52; B29D30/54; B29D30/542; Y; Y10; Y10S; Y10S156/00; Y10S156/909
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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |