US2508924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bitumen-treating agent
Assignee: California Research LLC
•
Filing: 1950-04-11
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Granted: 1950-05-23
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Expires: 1970-04-11
Abstract
No abstract record available.
Inventors
- 👤 Edward W Mertens
- 👤 Don E Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:40
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
AN IMPROVED BONDING BITUMINOUS COMPOSITION CONSISTING ESSENTIALLY OF A BITUMINOUS SUBSTANCE NORMALLY POSSESSING STRIPPING TENDENCIES AND, INTIMATELY DISPERSIBLE THEREIN, A SMALL AMOUNT SUFFICIENT SUBSTANTIALLY TO LESSEN STRIPPING OF SAID BITUMINOUS SUBSTANCE, OF THE SALT OF AN ACYLAMIDO AMINE HAVING AT LEAST ONE FREE AMINO GROUP AND AN ORGANO-SUBSTITUTED INORGANIC ACID HAVING AT LEAST ONE FREE IONIZABLE HYDROGEN AND AT LEAST 2 CARBON ATOMS, SAID SALT HAVING AT LEAST 8 CARBON ATOMS IN THE MOLECULE.
Claim 2
Dependent Claim
74 words
AN IMPROVED BONDING BITUMINOUS COMPOSITION CONSISTING ESSENTIALLY OF A BITUMINOUS SUBSTANCE NORMALLY POSSESSING STRIPPING TENDENCIES AND, INTIMATELY DISPERSIBLE THEREIN, A SMALL AMOUNT SUFFICIENT SUBSTANTIALLY TO LESSEN STRIPPING OF SAID BITUMINOUS SUBSTANCE, OF THE SALT OF AN ACYLAMIDO AMINE HAVING AT LEAST ONE FREE AMINO GROUP AND AN ORGANO-SUBSTITUTED INORGANIC ACID HAVING AT LEAST ONE FREE IONIZABLE HYDROGEN AND AT LEAST 2 CARBON ATOMS, SAID SALT HAVING AT LEAST 8 CARBON ATOMS IN THE MOLECULE.
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) | 1953-05-22 | 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 |