US2521542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bituminous emulsions
Assignee: Patent and Licensing Corp
•
Filing: 1947-03-20
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Granted: 1950-09-05
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Expires: 1967-03-20
Abstract
No abstract record available.
Inventors
- 👤 Walter J Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:47
CPC Classifications
C; C08; C08L; C08L95/00; C08L95/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A BITUMINOUS EMULSION CONSISTING ESSENTIALLY OF APPROXIMATELY 45 TO 60% BITUMEN AS THE DISPERSE PHASE, APPROXIMATELY 1.5 TO 3% BENTONITE AS THE EMULSIFYING AGENT AND WATER AS THE CONTINUOUS PHASE, AND CONTAINING APPROXIMATELY 0.05 TO 0.5% BY WEIGHT OF AN ALKALI METAL SALT OF AN ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF TANNIC ACID, GALLIC ACID AND PYROGALLIC ACID, THE AMOUNT OF SAID SALT BEING SUFFICIENT TO IMPART TO THE EMULSION A VISCOSITY SUBSTANTIALLY LOWER THAN IT NORMALLY POSESSES IN THE ABSENCE OF SAID SALT.
Claim 2
Dependent Claim
86 words
A BITUMINOUS EMULSION CONSISTING ESSENTIALLY OF APPROXIMATELY 45 TO 60% BITUMEN AS THE DISPERSE PHASE, APPROXIMATELY 1.5 TO 3% BENTONITE AS THE EMULSIFYING AGENT AND WATER AS THE CONTINUOUS PHASE, AND CONTAINING APPROXIMATELY 0.05 TO 0.5% BY WEIGHT OF AN ALKALI METAL SALT OF AN ORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF TANNIC ACID, GALLIC ACID AND PYROGALLIC ACID, THE AMOUNT OF SAID SALT BEING SUFFICIENT TO IMPART TO THE EMULSION A VISCOSITY SUBSTANTIALLY LOWER THAN IT NORMALLY POSESSES IN THE ABSENCE OF SAID SALT.
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) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |