US2517564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphalt compositions
Assignee: Shell Development Co
•
Filing: 1947-08-12
•
Granted: 1950-08-08
•
Expires: 1967-08-12
Abstract
No abstract record available.
Inventors
- 👤 Harman Denham
- 👤 Harry J Sommer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:53
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/36; C08K5/37; C08K5/372; C08K5/3725
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
AN ASPALT COMPOSITION CONSISTING ESSENTIALLY OF ASPHALT AND 0.2-3% BY WEIGHT EACH OF AN OLEOPHILIC CARBOXYLIC ACID AND A POLYSULFIDE HAVING THE GENERAL CONFIGURATION
Claim 2
Dependent Claim
24 words
AN ASPALT COMPOSITION CONSISTING ESSENTIALLY OF ASPHALT AND 0.2-3% BY WEIGHT EACH OF AN OLEOPHILIC CARBOXYLIC ACID AND A POLYSULFIDE HAVING THE GENERAL CONFIGURATION
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) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |