Help with Some History
 

I've been doing a lot of work on our Wikipedia pages as they're probably the first place anyone looks for information. I'm planning to do a fancy time-lapse animation of all our chapters from 1873-2008. To make it work, however, I need some help with a few closing/re-chartering dates that are missing:

Psi 1907-1916, 1921-1936, ?-Present
Alpha Epsilon 1910-?, 1994-2007
Zeta Deuteron 1917-1929, ?-1973
Eta Deuteron 1917-?
Upsilon Deuteron 1926-1936, ?-1982
Epsilon Delta 1930-?
Epsilon Zeta 1930-?
Epsilon Eta 1931-?
Epsilon Theta 1935-?
Chi Triton 1949-?, 2008-Present
Epsilon Upsilon 1950-?
Delta Tetarton 1950-?, 1993-Present
Epsilon Tetarton 1952-?
Epsilon Chi 1952-?
Phi Delta 1955-?
Phi Gamma 1956-?
Phi Epsilon 1956-?
Phi Lambda 1956-?
Kappa Tetarton 1957-?, 2003-Present
Phi Zeta 1958-?
Phi Eta 1959-?
Phi Theta 1958-?
Sigma Chi 1960-?
Phi Pi 1960-?
Sigma Tetarton 1960-?, 2002-Present
Sigma Alpha 1960-?
Phi Omicron 1961-?
Phi Nu 1962-?
Phi Xi 1962-?
Beta Pentaton 1963-?, 2003-Present
Gamma Pentaton 1963-?
Phi Rho 1963-?
Zeta Pentaton 1964-?
Phi Sigma 1965-?
Phi Phi 1965-?
Kappa Pentaton 1966-?, 2004-Present
Xi Pentaton 1967-1970, ?-Present
Sigma Beta 1967-?
Sigma Delta 1968-?
Phi Pentaton 1968-?
Sigma Epsilon 1968-?
Sigma Gamma 1969-?
Sigma Eta 1969-?
Sigma Kappa 1969-?
Sigma Iota 1969-?
Psi Pentaton 1969-?
Sigma Theta 1969-?
Sigma Lambda 1969-?
Sigma Mu 1969-?
Sigma Nu 1970-?
Phi Omega 1970-?
Sigma Xi 1970-?
Phi Chi 1970-?
Phi Psi 1970-?
Beta Hexaton 1971-?
Epsilon Hexaton 1972-?, 2007-Present
Eta Hexaton 1972-?, 2001-Present
Iota Hexaton 1973-?
Lambda Hexaton 1976-?
Mu Hexaton 1976-?, 2007-Present
Xi Hexaton 1976-?
Pi Hexaton 1979-?
Chi Hexaton 1988-?
Psi Hexaton 1989-?
Omega Hexaton 1989-?
Delta Septaton 1990-?
Zeta Septaton 1990-?
Theta Septaton 1992-?
Pi Septaton 1996-?
Rho Septaton 1999-?

re: Phi Sigma Kappa chapter dates
 

I am not a Phi Sig but I have an extensive fraternity-sorority library and can supplement many of the dates you need. Most were obtained from PSK publications or college sites.

Psi 1954-1981; ????-present
Alpha Epsilon 1910-1989
Zeta Deut. 1917-1935; 1954-1973
Eta Deut. 1917-1998
Upsilon Deut. 1967-1982
Epsilon Zeta 1930-1979
Epsilon Eta 1931-1985; 199?-200?
Epsilon Theta 1931-1998
Delta Tet. 1951-1959; 1993
Epsilon Tet. 1952-1972; 19??-199?
Epsilon Chi 1950-1954: 1972-200?
Phi Gamma 1956-1980
Phi Lambda 1956-1972
Kappa Tet. 1957-199?; 2003
Phi Zeta 1958-1972
Phi Eta 1959-1972
Phi Theta 1959-200?
Phi Pi 1960-1976
Sigma Tet. 1960-199?; 2002
Sigma Alpha 1960-1989
Phi Omicron 1961-1978
Phi Nu 1962-1978
Phi Xi 1962-1977
Xi Pent. 1967-1972; 1992
Phi Pent. 1968-19??; 1988-199?
Sigma Kappa 1969-1976
Sigma Iota 1969-1991
Sigma Theta 1969-1972
Sigma Xi 1970-1975
Phi Chi 1971-1976
Beta Hex. 1971-1992
Epsilon Hex. 1972-2001; 2007
Eta Hex. 1972-1997: 2002
Psi Hex. where was this chapter located?
Pi Sep. 1996-1999
Rho Sep. 1999-2007

I hope this helps. Look forward to your finished product.

the only one i can really help on is the Kappa Tetarton chapter. Kappa Tet originally lost it's charter in 1998. though it's not much, hope it helps.

Psi Hexaton was one of Phi Sig's attempts at setting up in Canada: McGill University in Quebec

Thank you very much for these other dates. This project sounded easier when I began as I didn't realize how many chapters have not enjoyed continuous existence.

Thank you - that narrows it to the chapters below (sorry the formatting is all weird).

Chapter School Charter Range
Psi University of Virginia 1907-1916, 1921-1936, 1954-1981, ?-Present
Epsilon Delta Eastern Illinois University 1930-?
Chi Triton Arizona State University 1949-?, 2008-Present
Epsilon Upsilon UW-Whitewater 1950-?
Phi Delta Black Hills State College 1955-?
Phi Epsilon Rider College 1956-?
Phi Eta Clarion University 1959-?
Sigma Chi Shepherd University 1960-?
Beta Pentaton East Stroudsburg University 1963-?, 2003-Present
Gamma Pentaton University of Utah 1963-?
Phi Rho Chadron State College 1963-?
Phi Sigma Hillsdale College 1965-?
Phi Phi UW-Oshkosh 1965-?
Kappa Pentaton UC Santa Barbara 1966-?, 2004-Present
Sigma Beta Southwest Missouri State University 1967-?
Sigma Delta St. Norbert College 1968-?
Phi Pentaton University of Arizona 1968-?, 1988-1995
Sigma Epsilon Ferris State University 1968-?
Sigma Gamma Wayne State College 1969-?
Sigma Eta Southeast Missouri State University 1969-?
Psi Pentaton Memphis State University 1969-?
Sigma Lambda University of Minnesota-Morris 1969-?
Sigma Mu Manhattan College 1969-?
Sigma Nu Slippery Rock University 1970-?
Phi Omega Minnesota State University-Moorhead 1970-?
Phi Psi College of St. Thomas 1970-?
Iota Hexaton Fairleigh Dickinson University 1973-?
Lambda Hexaton St. Joseph's University 1976-?
Mu Hexaton Radford University 1976-?, 2007-Present
Xi Hexaton Clinch Valley College 1976-?
Pi Hexaton Occidental College 1979-?
Chi Hexaton Virginia Commonwealth University 1988-?
Psi Hexaton McGill University 1989-?
Omega Hexaton University of California at Irvine 1989-?
Delta Septaton UW-Green Bay 1990-?
Zeta Septaton Johnson & Wales University 1990-?
Theta Septaton Marist College 1992-?

Mu Hexaton 1976-2001, 2007-Present