US2582824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bituminous composition
Assignee: Shell Development Co
•
Filing: 1948-03-23
•
Granted: 1952-01-15
•
Expires: 1968-03-23
Abstract
No abstract record available.
Inventors
- 👤 Frederick M Fowkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:53
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
67 words
A BITUMINOUS COMPOSITION COMPRISING A WET AGGREGATE, AN ASPHALT AND, AT THE INTERFACE THEREBETWEEN, A BONDING AGENT WHICH IS AN AMINE SALT OF A WATER-INSOLUBLE POLYAMINE AND A FATTY ACID OF AT LEAST 12 CARBON ATOMS, WHEREIN THE POLYAMINE IS SELECTED FROM THE GROUP CONSISTING OF LOWER POLYALKYLENE POLYAMINES AND A HYDROGENATED POLYAMINE CONDENSATION PRODUCT OF ACROLEIN AND AMMONIA, SAID AMINE SALT BEING FREE FROM AMIDO GROUPS.
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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 |