Patent US2661301A successfully refreshed from Google Patents.
US2661301A
Expired / Lapsed
US
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Compositions comprising bentoniteorganic amine compounds in asphalts, tars, or pitches
Assignee: Gulf Research and Development Co
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Filing: 1949-04-04
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Granted: 1953-12-01
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Expires: 1969-04-04
Abstract
No abstract record available.
Inventors
- 👤 Robert G Capell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:37
CPC Classifications
C; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
A COMPOSITION OF MATTER COMPRISING A DISPERSION OF A MINOR PROPORTION OF A COMPOUND OF A BENTONITE AND AN ORGANIC NITROGEN BASE CONTAINING AT LEAST 10 CARBON ATOMS IN AN ALKYL GROUP IN A MAJOR PROPORTION OF A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF ASPHALTS, TARS AND PITCHES, THE AMOUNT OF SAID COMPOUND IN SAID COMPOSITION OF MATTER BEING SUFFICIENT TO INCREASE THE SOFTENING POINT AND IMPROVE THE PENETRATION CHARACTERISTICS OF SAID COMPOSITION OF MATTER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |