PL/SQL :: Get Expected Results From Pivot?

with t1 as
(
select 'eff_date' param_name, 'mb256_type' param_type,'01-01-1970' param_value from dual
union all
select 'disc_date' param_name, 'mb256_type' param_type,'31-12-9999' param_value from dual
union all
select 'initial val' param_name, 'mb256_type' param_type,'30' param_value from dual)
select param_name,param_type,param_value from t1;

desired output:

need output in a row in three different columns

param_value
01-01-1970    31-12-9999 30

I tried below query

SELECT *   
FROM   (
with t1 as
(
select 'eff_date' param_name, 'mb256_type' param_type,'01-01-1970' param_value from dual
union all
select 'disc_date' param_name, 'mb256_type' param_type,'31-12-9999' param_value from dual

[code]...

and am getting output as

param_type      eff_date_param_value   disc_date_param_value   initial_ignoring_param_value
mbn256_type    <null>                                 <null>                           <null>