US2508431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bitumen-treating agent
Assignee: California Research LLC
•
Filing: 1949-02-17
•
Granted: 1950-05-23
•
Expires: 1969-02-17
Abstract
No abstract record available.
Inventors
- 👤 Vaughn R Smith
- 👤 Don E Stevens
- 👤 Edward W Mertens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:32
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/521; Y; Y10; Y10S; Y10S106/00; Y10S106/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A BITUMINOUS COMPOSITION HAVING SUPERIOR ANTI-STRIPPING PROPERTIES CONSISTING ESSENTIALLY OF A BITUMEN NORMALLY POSSESSING STRIPPING TENDENCIES AND AN AMOUNT SUFFICIENT SUBSTANTIALLY TO LESSEN STRIPPING OF SAID BITUMEN OF THE SALT OF AN ORGANO-SUBSTITUTED ACID OF PHOSPHORUS HAVING AT LEAST TWO CARBON ATOMS AND A MONOAMINE CHARACTERIZED BY AN ACYLIC CARBON-TO-NITROGEN BOND, SAID SALT HAVING AT LEAST TWELVE CARBON ATOMS IN THE MOLECULE.
Claim 2
Dependent Claim
62 words
A BITUMINOUS COMPOSITION HAVING SUPERIOR ANTI-STRIPPING PROPERTIES CONSISTING ESSENTIALLY OF A BITUMEN NORMALLY POSSESSING STRIPPING TENDENCIES AND AN AMOUNT SUFFICIENT SUBSTANTIALLY TO LESSEN STRIPPING OF SAID BITUMEN OF THE SALT OF AN ORGANO-SUBSTITUTED ACID OF PHOSPHORUS HAVING AT LEAST TWO CARBON ATOMS AND A MONOAMINE CHARACTERIZED BY AN ACYLIC CARBON-TO-NITROGEN BOND, SAID SALT HAVING AT LEAST TWELVE CARBON ATOMS IN THE MOLECULE.
References Cited (Backward Citations)
US2063629A
Cited
US2191295A
Cited
US2370386A
Cited
US2378235A
Cited
US2387537A
Cited
US2447288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |