US2582264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Softening agent for rubber and resulatant rubber composition
Assignee: Shell Development Co
•
Filing: 1949-06-25
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Granted: 1952-01-15
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Expires: 1969-06-25
Abstract
No abstract record available.
Inventors
- 👤 Frank M Mcmillan
- 👤 De Loss E Winkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:45
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/01; C08K5/04; C08K5/09; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A RUBBER SOFTENING COMPOSITION COMPRISING FROM ABOUT 15 TO 60% NAPHTHENIC ACIDS, AT LEAST 15% OF AN AROMATIC PETROLEUM DERIVATIVE, AND FROM 0 TO 50% OF A NEUTRAL PETROLEUM OIL, SAID AROMATIC PETROLEUM DERIVATIVE HAVING A VISCOSITY OF AT LEAST 10 CS. AT 210* F., SOFTENING BELOW 200* F., AND HAVING A SPECIFIC GRAVITY (D420) OF FROM 0.9 TO 1.05.
Claim 2
Dependent Claim
60 words
A RUBBER SOFTENING COMPOSITION COMPRISING FROM ABOUT 15 TO 60% NAPHTHENIC ACIDS, AT LEAST 15% OF AN AROMATIC PETROLEUM DERIVATIVE, AND FROM 0 TO 50% OF A NEUTRAL PETROLEUM OIL, SAID AROMATIC PETROLEUM DERIVATIVE HAVING A VISCOSITY OF AT LEAST 10 CS. AT 210* F., SOFTENING BELOW 200* F., AND HAVING A SPECIFIC GRAVITY (D420) OF FROM 0.9 TO 1.05.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |