US2535931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reclaiming elastomers
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1947-09-18
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Granted: 1950-12-26
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Expires: 1967-09-18
Abstract
No abstract record available.
Inventors
- 👤 Jr John H Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:14
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/10; C08J11/18; C08J11/28; C08J2321/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
A METHOD OF RECLAIMING A VULCANIZED RUBBERY MASS COMPRISING AT LEAST ONE POLYMERIZATION PRODUCT OF A MATERIAL HAVING A CONJUGATED DIOLEFINIC COMPOUND AS A MAIN POLYMERIZABLE COMPONENT, WHICH METHOD COMPRISES HEATING SAID RUBBERY MASS AS ELEVATED TEMPERATURE, ABOVE 200* F. BUT NOT APPRECIABLY ABOVE 400*F., IN THE PRESENCE OF A RELATIVELY SMALL AMOUNT OF A COMPOUND HAVING AT LEAST THREE CARBON ATOMS IN AN ALKYL GROUP THEREOF, SELECTED FROM THE GROUP CONSISTING OF ALKYL PHOSPHATES, ALKYL PHOSPHORIC ACIDS AND ALKYL PHOSPHORIC ACID SALTS, SAID GROUP MEMBERS BEING FURTHER CHARACTERIZED IN THAT ALL HYDROCARBON GROUPS ARE MONO-VALENT, SAID COMPOUND BEING DISTRIBUTED THROUGH SAID RUBBERY MASS DURING AT LEAST PART OF SAID HEATING, WHEREBY PLASTICIZATION OF SAID RUBBERY MASS OCCURS.
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) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |