diff --git a/schemars/src/json_schema_impls/core.rs b/schemars/src/json_schema_impls/core.rs
index 1deaec8..4f456a2 100644
--- a/schemars/src/json_schema_impls/core.rs
+++ b/schemars/src/json_schema_impls/core.rs
@@ -48,6 +48,18 @@ impl<T: ?Sized> JsonSchema for std::marker::PhantomData<T> {
     }
 }
 
+impl JsonSchema for std::convert::Infallible {
+    no_ref_schema!();
+
+    fn schema_name() -> String {
+        "Never".to_owned()
+    }
+
+    fn json_schema(gen: &mut SchemaGenerator) -> Result {
+        Ok(gen.schema_for_none())
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/schemars/src/json_schema_impls/deref.rs b/schemars/src/json_schema_impls/deref.rs
index fea8799..369b883 100644
--- a/schemars/src/json_schema_impls/deref.rs
+++ b/schemars/src/json_schema_impls/deref.rs
@@ -27,4 +27,8 @@ deref_impl!(<'a, T> JsonSchema for &'a mut T);
 deref_impl!(<T> JsonSchema for Box<T>);
 deref_impl!(<T> JsonSchema for std::rc::Rc<T>);
 deref_impl!(<T> JsonSchema for std::sync::Arc<T>);
+deref_impl!(<T> JsonSchema for std::sync::Mutex<T>);
+deref_impl!(<T> JsonSchema for std::sync::RwLock<T>);
+deref_impl!(<T> JsonSchema for std::cell::Cell<T>);
+deref_impl!(<T> JsonSchema for std::cell::RefCell<T>);
 deref_impl!(<'a, T: ToOwned> JsonSchema for std::borrow::Cow<'a, T>);
diff --git a/schemars/src/json_schema_impls/mod.rs b/schemars/src/json_schema_impls/mod.rs
index 0f178d9..286a9ed 100644
--- a/schemars/src/json_schema_impls/mod.rs
+++ b/schemars/src/json_schema_impls/mod.rs
@@ -17,11 +17,10 @@ mod sequences;
 mod serdejson;
 mod tuple;
 
-// TODO chrono types under feature flag
 // TODO serde yaml value/map under feature flag
 // https://github.com/serde-rs/serde/blob/ce75418e40a593fc5c0902cbf4a45305a4178dd7/serde/src/ser/impls.rs
-// Cell<T>, RefCell<T>, Mutex<T>, RwLock<T>, Result<R,E>?, Duration, SystemTime,
+// Result<R,E>?, Duration, SystemTime,
 // IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV6, SocketAddrV6,
-// Path, PathBuf, OsStr, OsString, Wrapping<T>, Reverse<T>, AtomicBool, AtomixI8 etc.,
+// Path, PathBuf, OsStr, OsString, Wrapping<T>, Reverse<T>, AtomicBool, AtomicI8 etc.,
 // NonZeroU8 etc., ArcWeak, RcWeak, (!)?, Bound?, Range?, RangeInclusive?,
 // CString?, CStr?, fmt::Arguments?