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US2933441A
Expired / Lapsed
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Process of making rubber articles
Assignee: Astra Inc
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Filing: 1957-10-14
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Granted: 1960-04-19
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Expires: 1977-10-14
Abstract
No abstract record available.
Inventors
- 👤 Richard G Mallon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:51
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
THE PROCESS OF MAKING AN INFLATABLE RUBBER TIRE, SAID PROCESS COMPRISING PREPARATION OF RUBBER BATCHES OR COMPOSITIONS THE FIRST OF WHICH CONTAINS A CERTAIN PROPORTION OF SULPHUR AND A CERTAIN PROPORTION OF ACCELERATOR AND THE SECOND OF WHICH CONTAINS A LOWER PROPORTION OF SULPHUR AND A LOWER PROPORTION OF ACCELERATOR, FORMING THE ARTICLE FROM SUCH COMPOSITIONS SO THAT THE SECOND BATCH PORTION IS A TREAD PORTION JOINRD TO A SIDE WALL FIRST PORTION, HEATING THE ARTICLE IN A MOLD TO EFFECT A COMPLETE CURE OF THE SIDE WALL PORTION AND A PARTIAL CURE ONLY OF THE TREAD PORTION, AND THEN AFTER THE ARTICLE HAS BEEN REMOVED FROM THE MOLD DIRECTING IONIZING RAYS AGAINST SAID TREAD PORTION TO GIVE IT A FULL CURE.
Claim 2
Dependent Claim
122 words
THE PROCESS OF MAKING AN INFLATABLE RUBBER TIRE, SAID PROCESS COMPRISING PREPARATION OF RUBBER BATCHES OR COMPOSITIONS THE FIRST OF WHICH CONTAINS A CERTAIN PROPORTION OF SULPHUR AND A CERTAIN PROPORTION OF ACCELERATOR AND THE SECOND OF WHICH CONTAINS A LOWER PROPORTION OF SULPHUR AND A LOWER PROPORTION OF ACCELERATOR, FORMING THE ARTICLE FROM SUCH COMPOSITIONS SO THAT THE SECOND BATCH PORTION IS A TREAD PORTION JOINRD TO A SIDE WALL FIRST PORTION, HEATING THE ARTICLE IN A MOLD TO EFFECT A COMPLETE CURE OF THE SIDE WALL PORTION AND A PARTIAL CURE ONLY OF THE TREAD PORTION, AND THEN AFTER THE ARTICLE HAS BEEN REMOVED FROM THE MOLD DIRECTING IONIZING RAYS AGAINST SAID TREAD PORTION TO GIVE IT A FULL CURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |