Ramkumar Natarajan

US Patent:

20050160944, Jul 28, 2005

Filed:

Sep 14, 2004

Appl. No.:

10/941592

Inventors:

Arun Wagh - Naperville IL, US
Brandon Fisher - Bolingbrook IL, US
Ramkumar Natarajan - Chicago IL, US

Assignee:

The University of Chicago - Chicago IL

International Classification:

C04B012/02

US Classification:

106691000, 106705000, 106814000, 106802000

Abstract:

A dry mix of a calcined oxide of Ca and/or Mg and an acid phosphate and fly ash with or without insulating extenders useful in permafrost conditions. Calcined oxide is present at about 12% to about 40% by weight and the acid phosphate is present at about 35% to about 45% by weight. The fly ash is present at about 10% to about 50% by weight with the fly ash being between about 50% to about 100% class F with the remainder class C. Insulating extenders are present in the range from 0% to about 15% by weight of the combined calcined oxide and acid phosphate and fly ash. 0.1% to about 0.5% boric acid and/or borate by weight of the dry mix is present.

US Patent:

20070051278, Mar 8, 2007

Filed:

Jun 16, 2006

Appl. No.:

11/454724

Inventors:

Arun Wagh - Naperville IL, US
Ramkumar Natarajan - Woodridge IL, US
David Kahn - Miami FL, US

Assignee:

The University of Chicago - Chicago IL

International Classification:

C04B 28/34

US Classification:

106690000

Abstract:

A sealant having a specific gravity in the range of from about 0.7 to about 1.6 for heavy oil and/or coal bed methane fields is disclosed. The sealant has a binder including an oxide or hydroxide of Al or of Fe and a phosphoric acid solution. The binder may have MgO or an oxide of Fe and/or an acid phosphate. The binder is present from about 20 to about 50% by weight of the sealant with a lightweight additive present in the range of from about 1 to about 10% by weight of said sealant, a filler, and water sufficient to provide chemically bound water present in the range of from about 9 to about 36% by weight of the sealant when set. A porous ceramic is also disclosed.

US Patent:

20180103004, Apr 12, 2018

Filed:

Oct 7, 2016

Appl. No.:

15/288723

Inventors:

- Menlo Park CA, US
Wenyun Yang - Fremont CA, US
Robert Franklin Daniel - Redwood City CA, US
Yoram Talmor - Cupertino CA, US
Edward Young Zhang - San Francisco CA, US
Aayush Gupta - San Mateo CA, US
Ramkumar Natarajan - Redmond WA, US

International Classification:

H04L 12/58
H04L 29/08

Abstract:

The present disclosure is directed toward systems and methods for reengaging website visitors via a social networking system. For example, in accordance with one embodiment, a social networking system receives information regarding a user-triggered event associated with a merchant webpage, utilizes the received information to generate an electronic message from the merchant to the user, and provides the electronic message to the user via the social networking system. The user can then reengage with the merchant in response to the received electronic message.