US2669592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lignin-reinforced rubber
Assignee: HOWARD SMITH PAPER MILLS Ltd
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Filing: 1951-08-24
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Granted: 1954-02-16
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Expires: 1971-08-24
Abstract
No abstract record available.
Inventors
- 👤 Macgregor Donald Wesley
- 👤 Griffith Thomas Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:01
CPC Classifications
C; C08; C08L; C08L7/00; C08L21/00; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L97/00; C08L97/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A RE-INFORCED VULCANIZATE PREPARED BY VULCANIZING A COMPOSITION COMPRISING COPRECIPITATED NATURAL RUBBER AND LIGNIN IN THE PRESENCE OF AN ORGANIC ACCELERATOR, SUFFICIENT ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF LEAD OXIDE AND ZINC OXIDE TO ACTIVATE SAID ORGANIC ACCELERATOR, SULPHUR AND A MODIFIER EFFECTIVE TO INHIBIT THE CUREDELAYING ACTION OF THE LIGNIN, AND TO SUBSTANTIALLY ENHANCE THE TENSILE STRENGTH AND RESILIENCE OF THE SAID VULCANIZATE, SAID MODIFIER BEING SELECTED FROM THE GROUP CONSISTING OF THE OXIDES OF COPPER, LEAD AND BISMUTH.
Claim 2
Dependent Claim
81 words
A RE-INFORCED VULCANIZATE PREPARED BY VULCANIZING A COMPOSITION COMPRISING COPRECIPITATED NATURAL RUBBER AND LIGNIN IN THE PRESENCE OF AN ORGANIC ACCELERATOR, SUFFICIENT ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF LEAD OXIDE AND ZINC OXIDE TO ACTIVATE SAID ORGANIC ACCELERATOR, SULPHUR AND A MODIFIER EFFECTIVE TO INHIBIT THE CUREDELAYING ACTION OF THE LIGNIN, AND TO SUBSTANTIALLY ENHANCE THE TENSILE STRENGTH AND RESILIENCE OF THE SAID VULCANIZATE, SAID MODIFIER BEING SELECTED FROM THE GROUP CONSISTING OF THE OXIDES OF COPPER, LEAD AND BISMUTH.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |