After a little digging around, here's some more information.
Other Patriarchal parishes that joined the Metropolia:
29. Church of All Saints Glorified in the Russian Land, Amsterdam (Wolf Run), State of Ohio
43. Church of St. George the Great Martyr, Buffalo, State of New York
The Buffalo parish joined in 1970. I haven't been able to find a date for the Amsterdam/Wolf Run parish.
The following parishes have basically closed, but never left the Moscow Patriarchate:
24. St. Olga Church, Somerset, State of New Jersey
33. St. Nicholas Church, Edinboro, Pageville, State of Pennsylvania
40. Sts. Peter and Paul Church, Burgaw, State of North Carolina
There's an interesting article about the Burgaw parish
here.
As for this parish:
35. Sts. Peter and Paul Church, Mount Union, State of Pennsylvania
There's a parish of the Carpatho-Russian Diocese with an identical name and location, but that may just be an altogether different parish for all I know. At any rate, no such parish is currently listed among the Patriarchal parishes in US.
Finally, in addition to the Michigan parishes listed above, all the following still are active Patriarchal parishes:
1. St. Nicholas Church, Brookside, State of Alabama
. . .
4. St. Nicholas Cathedral, San Francisco, State of California
. . .
6. Our Lady of Kazan Church, San Diego, State of California
. . .
8. Dormition Church Benld, State of Illinois
9. Holy Trinity Church, Baltimore, State of Maryland
. . .
18. St. Nicholas Church, Bayonne, State of New Jersey
19. Sts. Peter and Paul Church, Elizabeth, State of New Jersey
20. Three Hierarchs Church, Garfield, State of New Jersey
21. Holy Cross Church, Hackettstown, State of New Jersey
22. Sts. Peter and Paul Church; Passaic, State of New Jersey
23. St. John the Baptist Church, Singac (Little Falls), State of New Jersey
. . .
26. Church of St. George the Great Martyr, State of New York
27. Church of All Saints Glorified in the Russian Land, on the estate of Pine Bush, State of New York
. . .
31. Nativity of Christ Church, Youngstown, State of Ohio
32. St. Nicholas Church, Chester, State of Pennsylvania
. . .
34. St. Nicholas Church, Reading, State of Pennsylvania
. . .
36. St. Nicholas Church, Wilkes-Barre, State of Pennsylvania
37. St. Andrew the Apostle Church, Philadelphia, State of Pennsylvania
38. St. Michael the Archangel Church, Philadelphia, State of Pennsylvania
39. Sts. Peter and Paul Church, Scranton, State of Pennsylvania
. . .
41. St. Gregory the Theologian Church, Tampa, State of Florida
42. Sts. Peter and Paul Church, Manchester, State of New Hampshire
. . .
That leaves 2, 3, 4, 16, 25, 28, and 30 unaccounted for.