US2761836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of clays
Assignee: Gulf Research and Development Co
•
Filing: 1954-11-18
•
Granted: 1956-09-04
•
Expires: 1974-11-18
Abstract
No abstract record available.
Inventors
- 👤 William E Brown
- 👤 Clifford R Giacobine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:45
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/607; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A METHOD OF STABILIZING A CLAY-CONTAINING BODY WHICH COMPRISES CONTACTING SUCH CLAY-CONTAINING BODY WITH SUBSTITUTED AMMONIUM IONS DERIVD FROM HETEROCYCLIC NITROGEN COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF HISTAMINE, 2,4-DIMETHYLPIPERIDINE, 2,2''-BIPYRIDINE, 2,2''DIPYRIDYLAMINE, 5-VINYL-2-METHYLPYRIDINE N-(3-AMINOPROPYL) MORPHOLINE, AND 3-(2-AMINOETHYL) INDOLE.
Claim 2
Independent Claim
38 words
A METHOD OF STABILIZING A CLAY-CONTAINING BODY WHICH COMPRISES CONTACTING SUCH CLAY-CONTAINING BODY WITH SUBSTITUTED AMMONIUM IONS DERIVD FROM HETEROCYCLIC NITROGEN COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF HISTAMINE, 2,4-DIMETHYLPIPERIDINE, 2,2''-BIPYRIDINE, 2,2''DIPYRIDYLAMINE, 5-VINYL-2-METHYLPYRIDINE N-(3-AMINOPROPYL) MORPHOLINE, AND 3-(2-AMINOETHYL) INDOLE.
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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) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |