How concurrent H1B visas work

You have many specific questions and your answers should be specific too. Please seek professional advice.

Travelling VIA UK/London while going from U.S. to India. Passport expiring in 4 months/ US H1B visa stamp valid for 2 years.

At some stage you would need to renew your passport. Make sure you keep the old passport with the new one. Some staple it together to make life...

please consult a local attorney because your question would be governed by your state law on contracts. In Indiana such contracts can be enforced...

My questions are about nonimmigrant visa for my mom.

It is all part of consular processing of visa. seek help if you think it is necessary and I assume this is for visitor visa since your post does...

H1B Visa, not stamped, and returning to home country for couple years. What are the possibilities of returning to US after 2yrs?

Your employer at that time will be able to petition and after approval you can return.

Can DV charge reduced to disturbing the peace affect my ability to become a naturalized citizen?

please contact a local immigration attorney experienced in criminal convictions before you do any thing including plea bargaining.

Green-card holder moving out of country. Do I need to file I-131?

This is a perfectly good reason for losing the greencard. If you are still interested in retaining your permanent resident status it may still be...

Does change of address (not moving the case) make me not eligible for EAD in F2A category pending case?

Moving from the current address should not affect your eligibility however you should update USCIS with your new address.

Renew a F1 Visa.

Questions like this involve analysis of how criminal record influences immigration history which is complex enough and any advice should be based...

Unused, unexpired H1b petition - can this be of any use?

Your question presents a real interesting situation. I would say it does not look too optimistic though for you. There is a missing information...