US2578653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for stabilizing polydiene polymer reacted with sulfur dioxide and resulting products
Assignee: Shell Development Co
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Filing: 1949-04-26
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Granted: 1951-12-18
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Expires: 1969-04-26
Abstract
No abstract record available.
Inventors
- 👤 Goppel Johan Michael
- 👤 Rumscheidt Gottfried Ernst
- 👤 Hackmann Johannes Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:09
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/24; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2971; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31986
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
THE METHOD OF INCREASING THE RESISTANCE TO DETERIORATION OF A PRODUCT FORMED ON THE REACTION OF NATURAL RUBBER WITH SULFUR DIOXIDE, SAID METHOD COMPRISING IMPREGNATING SAID PRODUCT WITH A SOLUTION CONTAINING FROM 0.1 TO 20% AMMONIUM THIOCYANATE.
Claim 2
Independent Claim
37 words
THE METHOD OF INCREASING THE RESISTANCE TO DETERIORATION OF A PRODUCT FORMED ON THE REACTION OF NATURAL RUBBER WITH SULFUR DIOXIDE, SAID METHOD COMPRISING IMPREGNATING SAID PRODUCT WITH A SOLUTION CONTAINING FROM 0.1 TO 20% AMMONIUM THIOCYANATE.
References Cited (Backward Citations)
US1410699A
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US1839950A
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US2136342A
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US2313945A
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US2469847A
Cited
US2415839A
Cited
US2381186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |