Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
76th United States Congress
Table title:
Senate
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > State (class) </th><th colspan=1 rowspan=1 > Vacator </th><th colspan=1 rowspan=1 > Reason for change </th><th colspan=1 rowspan=1 > Successor </th><th colspan=1 rowspan=1 > Date of successor's formal installation </th></tr>
<tr> <td colspan=1 rowspan=1 > Illinois (2) </td><td class="highlighted"  colspan=1 rowspan=1 > J. Hamilton Lewis (D) </td><td class="highlighted"  colspan=1 rowspan=1 > Died April 9, 1939. Successor appointed April 14, 1939, to continue the term. </td><td class="highlighted"  colspan=1 rowspan=1 > James M. Slattery (D) </td><td class="highlighted"  colspan=1 rowspan=1 > April 14, 1939 </td></tr>
<tr> <td colspan=1 rowspan=1 > Kentucky (2) </td><td colspan=1 rowspan=1 > M. M. Logan (D) </td><td colspan=1 rowspan=1 > Died October 3, 1939. Successor appointed October 10, 1939, to continue the term. </td><td colspan=1 rowspan=1 > Happy Chandler (D) </td><td colspan=1 rowspan=1 > October 10, 1939 </td></tr>
<tr> <td colspan=1 rowspan=1 > Idaho (2) </td><td colspan=1 rowspan=1 > William E. Borah (R) </td><td colspan=1 rowspan=1 > Died January 19, 1940. Successor appointed January 27, 1940, to continue the term. </td><td colspan=1 rowspan=1 > John W. Thomas (R) </td><td colspan=1 rowspan=1 > January 27, 1940 </td></tr>
<tr> <td colspan=1 rowspan=1 > Vermont (3) </td><td colspan=1 rowspan=1 > Ernest W. Gibson (R) </td><td colspan=1 rowspan=1 > Died June 20, 1940. Successor appointed October 14, 1940, to continue the term. </td><td colspan=1 rowspan=1 > Ernest W. Gibson, Jr. (R) </td><td colspan=1 rowspan=1 > October 14, 1940 </td></tr>
<tr> <td colspan=1 rowspan=1 > Minnesota (2) </td><td colspan=1 rowspan=1 > Ernest Lundeen (FL) </td><td colspan=1 rowspan=1 > Died August 31, 1940. Successor appointed October 14, 1940, to continue the term. Successor lost election to finish the term. </td><td colspan=1 rowspan=1 > Joseph H. Ball (R) </td><td colspan=1 rowspan=1 > October 14, 1940 </td></tr>
<tr> <td colspan=1 rowspan=1 > Nevada (1) </td><td colspan=1 rowspan=1 > Key Pittman (D) </td><td colspan=1 rowspan=1 > Died November 10, 1940. Successor appointed November 27, 1940, to continue the term. Successor lost nomination to finish the term. </td><td colspan=1 rowspan=1 > Berkeley L. Bunker (D) </td><td colspan=1 rowspan=1 > November 27, 1940 </td></tr>
<tr> <td colspan=1 rowspan=1 > Illinois (2) </td><td class="highlighted"  colspan=1 rowspan=1 > James M. Slattery (D) </td><td class="highlighted"  colspan=1 rowspan=1 > Interim appointee lost election November 21, 1940, to finish the term. </td><td class="highlighted"  colspan=1 rowspan=1 > Charles W. Brooks (R) </td><td class="highlighted"  colspan=1 rowspan=1 > November 22, 1940 </td></tr>
<tr> <td colspan=1 rowspan=1 > Washington (1) </td><td colspan=1 rowspan=1 > Lewis B. Schwellenbach (D) </td><td colspan=1 rowspan=1 > Resigned December 16, 1940, to become judge of the U.S. District Court for the Eastern District of Washington. </td><td colspan=1 rowspan=1 > Monrad Wallgren (D) </td><td colspan=1 rowspan=1 > December 19, 1940 </td></tr>
</table>
Question:
When did James Hamilton Lewis (D), James M. Slattery (D), and  Charles W. Brooks (R) were formally installed?
Answer:
James Hamilton Lewis (D), until April 9, 1939 James M. Slattery (D), April 14, 1939 – November 21, 1940 Charles W. Brooks (R), from November 22, 1940.