This is domain names expiring process each of these TLD's go through when they expire. The duration of REGISTRAR-HOLD or clientHOLD is depending on the registrars.

.COM
1) REGISTRAR-HOLD (1-45 days)
2) REDEMPTIONPERIOD (30 days)
3) PENDINGDELETE (5 days)

.NET
1) REGISTRAR-HOLD (1-45 days)
2) REDEMPTIONPERIOD (30 days)
3) PENDINGDELETE (5 days)

.ORG
1) clientHOLD (1-45 days)
2) Pending Delete - Restorable (30 days)
3) PENDING DELETE SCHEDULED FOR RELEASE (5 days)

.INFO
1) clientHOLD (1-45 days)
2) Pending Delete - Restorable (30 days)
3) PENDING DELETE SCHEDULED FOR RELEASE (5 days)

.BIZ
1) clientHOLD (1-45 days)
2) pendingDelete (35 days)

.US
1) clientHOLD (1-45 days)
2) pendingDelete (35 days)


* Any "delete" of a domain name (whether inside or outside of any applicable grace period) will result in a 30-day Deleted Name Redemption Grace Period. This grace period will allow the domain name registrant, registrar, and/or registry time to detect and correct any mistaken deletions.

* During this 30-day period, the deleted name will be placed on REGISTRY-HOLD, which will cause the name to be removed from the zone. (The domain name therefore will not function/resolve.) This feature will help ensure notice to the registrant that the name is subject to deletion at the end of the Redemption Grace Period, even if the contact data the registrar has for the registrant is no longer accurate.

* During the Redemption Grace Period, registrants could redeem their registrations through registrars. Registrars would be able to redeem the name in the registry for the original registrant by paying renewal fees, plus a service charge, to the registry operator. Any party requesting redemption would be required to prove its identity as the original registrant of the name.

* Registries would implement procedures allowing for rapid restoration of resolution (within one day).

* The proposed Redemption Grace Period would apply to all unsponsored TLDs (currently .biz, .com, .info, .name, .net and .org.)

Source: ICANN - Redemption Grace Periods for Deleted Names