US2761835A
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
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:30
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86; C09K8/88; C09K8/90; C09K8/905; C09K8/607; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A METHOD OF STABILIZING A CLAY-CONTAING BODY WHICH COMPRISES CONTACTING SUCH CLAY-CONTAINING BODY WITH SUBSTITUTED AMMONIUM IONS, DERIVED FROM ALIPHATIC NITROGEN COMPOUNDS, SELECTED FROM THE GROUP CONSISTING OF DI-ALKYL-SUBSTITUTED AMMONIUM IONS WHEREIN EACH ALKYL SUBSTITUENT HAS A TOTAL OF 3 TO 8 CARBON ATOMS, WITH THE LONGEST STRAIGHT CHAIN, STARTING WITH THE CARBON ATTACHED TO THE NITROGEN, HAVING 3 TO 7 CARBON ATOMS; TRIALKYL-SUBSTITUTED AMMONIUM IONS WHEREIN EACH ALKYL SUBSTITUENT HAS A TOTAL OF 3 TO 8 CARBON ATOMS, WITH THE LONGEST STRAIGHT CHAIN, STARTING WITH THE CARBON ATTACHED TO THE NITROGEN, HAVING 3 TO 7 CARBON ATOMS; AND TETRAALKYL-SUBSTITUTED AMMONIUM IONS WHEREIN EACH ALKYL SUBSTITUENT HAS A TOTAL OF 2 TO 8 CARBON ATOMS, WITH THE LONGEST STRAIGHT CHAIN, STARTING WITH THE CARBON ATTACHED TO THE NITROGEN, HAVING 2 TO 7 CARBON ATOMS.
Claim 2
Independent Claim
134 words
A METHOD OF STABILIZING A CLAY-CONTAING BODY WHICH COMPRISES CONTACTING SUCH CLAY-CONTAINING BODY WITH SUBSTITUTED AMMONIUM IONS, DERIVED FROM ALIPHATIC NITROGEN COMPOUNDS, SELECTED FROM THE GROUP CONSISTING OF DI-ALKYL-SUBSTITUTED AMMONIUM IONS WHEREIN EACH ALKYL SUBSTITUENT HAS A TOTAL OF 3 TO 8 CARBON ATOMS, WITH THE LONGEST STRAIGHT CHAIN, STARTING WITH THE CARBON ATTACHED TO THE NITROGEN, HAVING 3 TO 7 CARBON ATOMS; TRIALKYL-SUBSTITUTED AMMONIUM IONS WHEREIN EACH ALKYL SUBSTITUENT HAS A TOTAL OF 3 TO 8 CARBON ATOMS, WITH THE LONGEST STRAIGHT CHAIN, STARTING WITH THE CARBON ATTACHED TO THE NITROGEN, HAVING 3 TO 7 CARBON ATOMS; AND TETRAALKYL-SUBSTITUTED AMMONIUM IONS WHEREIN EACH ALKYL SUBSTITUENT HAS A TOTAL OF 2 TO 8 CARBON ATOMS, WITH THE LONGEST STRAIGHT CHAIN, STARTING WITH THE CARBON ATTACHED TO THE NITROGEN, HAVING 2 TO 7 CARBON ATOMS.
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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 |