US2469728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Increasing adhesivity of asphalt to mineral aggregate consisting of mollusk shells
Assignee: Standard Oil Development Co
•
Filing: 1945-10-17
•
Granted: 1949-05-10
•
Expires: 1965-10-17
Abstract
No abstract record available.
Inventors
- 👤 Holmes August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:10
CPC Classifications
C; C08; C08L; C08L95/00; Y; Y10; Y10S; Y10S106/00; Y10S106/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1164041A
Cited
US1361140A
Cited
GB417776A
Cited
US2056520A
Cited
US2191295A
Cited
US2283937A
Cited
US2212574A
Cited
GB560716A
Cited
GB568385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |