US2534828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphalt bituminous bonding composition and process of preparation
Assignee: Shell Development Co
•
Filing: 1948-08-14
•
Granted: 1950-12-19
•
Expires: 1968-08-14
Abstract
No abstract record available.
Inventors
- 👤 Lloyd J Mitchell
- 👤 Harry J Sommer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:52
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3442; C08K5/3462
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A BITUMINOUS COMPOSITION COMPRISING AN ASPHALT AND 0.10-5% BY WEIGHT OF A SUBSTITUTED PYRIMIDINE HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
18 words
A BITUMINOUS COMPOSITION COMPRISING AN ASPHALT AND 0.10-5% BY WEIGHT OF A SUBSTITUTED PYRIMIDINE HAVING THE GENERAL FORMULA
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) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |