Patent US2581906A successfully refreshed from Google Patents.
US2581906A
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Antiflex-cracking agents in rubber
Assignee: Flrestone Tire & Rubber Co
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Filing: 1948-07-01
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Granted: 1952-01-08
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Expires: 1968-07-01
Abstract
No abstract record available.
Inventors
- 👤 Jr George E P Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:44
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
CURED NATURAL RUBBER WHICH CONTAINS AS FLEX-CRACKING INHIBIT A SMALL AMOUNT OF A CREYSLIC ACID ALKYLATED NY INTRODUCTION OF ONE TO TWO HYDROCARBON SUBSTITUENTS OF FOUR TO TWELVE CARBON ATOMS PER CRESYLIC ACID MOLECULE, THE ALKYLATED CRESYLIC ACID BEING CONSTITUTED OF A MIXTURE IF COMPOUND WHICH BOILS ABOVE 100* C. AT TEN MILLIMETERS PRESSURE AND BEING DERIVED FROM CRESYLIC ACID BOILING AT 190* TO 250* C. AT ATMOSPHERIC PRESSURE.
Claim 2
Dependent Claim
69 words
CURED NATURAL RUBBER WHICH CONTAINS AS FLEX-CRACKING INHIBIT A SMALL AMOUNT OF A CREYSLIC ACID ALKYLATED NY INTRODUCTION OF ONE TO TWO HYDROCARBON SUBSTITUENTS OF FOUR TO TWELVE CARBON ATOMS PER CRESYLIC ACID MOLECULE, THE ALKYLATED CRESYLIC ACID BEING CONSTITUTED OF A MIXTURE IF COMPOUND WHICH BOILS ABOVE 100* C. AT TEN MILLIMETERS PRESSURE AND BEING DERIVED FROM CRESYLIC ACID BOILING AT 190* TO 250* C. AT ATMOSPHERIC PRESSURE.
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) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |