Can I go for H4 visa stamping (extension) while spouse H1 is extended but not stamped

[sumedhap]

Hi,

My husband is on H1 visa and is going to expire in aug,2018 and hence mine too.
He got his visa transferred from company A to B and has got new I797 which is valid till 2021.

I am in India and i have H4 visa with previous employer.
Can i go for H4 stamping with the new employer while my husband is still in USA and his visa is not yet stamped with the new employer.

Is there anything that needs to be applied for my H4 visa extension and stamping.

Thanks a lot in advance.
I look forward to getting some advice on this topic