
| Serial Number | 86348007 | 
| Word Mark | CLAYGUARD | 
| Filing Date | Friday, July 25, 2014 | 
| Status | 710 - CANCELLED - SECTION 8 | 
| Status Date | Friday, September 19, 2025 | 
| Registration Number | 4695824 | 
| Registration Date | Tuesday, March 3, 2015 | 
| Mark Drawing | 4 - Illustration: Drawing with word(s) / letter(s) / number(s) in Block form | 
| Published for Opposition Date | Tuesday, December 16, 2014 | 
| Pseudo Mark | CLAY GUARD | 
| Goods and Services | Additive used to inhibit hydration and swelling of clay materials in oil and gas drilling, stimulation, or work over operations | 
| International Class | 001 - Chemicals used in industry, science and photography, as well as in agriculture, horticulture and forestry; unprocessed artificial resins; unprocessed plastics; manures; fire extinguishing compositions; tempering and soldering preparations; chemical substances for preserving foodstuffs; tanning substances; adhesives used in industry. | 
| US Class Codes | 001, 005, 006, 010, 026, 046 | 
| Class Status Code | 2 - Sec. 8 - Entire Registration | 
| Class Status Date | Friday, September 19, 2025 | 
| Primary Code | 001 | 
| First Use Anywhere Date | Tuesday, August 11, 2009 | 
| First Use In Commerce Date | Tuesday, August 11, 2009 | 
| Party Name | THE LUBRIZOL CORPORATION | 
| Party Type | 32 - New Owner After Registration | 
| Legal Entity Type | 03 - Corporation | 
| Address | WICKLIFFE, OH 440922298 | 
| Party Name | LUBRIZOL OILFIELD SOLUTIONS, INC. | 
| Party Type | 31 - New Owner After Registration | 
| Legal Entity Type | 03 - Corporation | 
| Address | WICKLIFFE, OH 440922298 | 
| Party Name | Weatherford/Lamb, Inc. | 
| Party Type | 30 - Original Registrant | 
| Legal Entity Type | 03 - Corporation | 
| Address | Houston, TX 77056 | 
| Party Name | Weatherford/Lamb, Inc. | 
| Party Type | 20 - Owner at Publication | 
| Legal Entity Type | 03 - Corporation | 
| Address | Houston, TX 77056 | 
| Party Name | Weatherford/Lamb, Inc. | 
| Party Type | 10 - Original Applicant | 
| Legal Entity Type | 03 - Corporation | 
| Address | Houston, TX 77056 | 
| Event Date | Event Description | 
| Monday, August 4, 2014 | NEW APPLICATION OFFICE SUPPLIED DATA ENTERED | 
| Tuesday, July 29, 2014 | NEW APPLICATION ENTERED | 
| Tuesday, August 5, 2014 | NOTICE OF PSEUDO MARK E-MAILED | 
| Tuesday, March 3, 2020 | COURTESY REMINDER - SEC. 8 (6-YR) E-MAILED | 
| Wednesday, March 25, 2020 | AUTOMATIC UPDATE OF ASSIGNMENT OF OWNERSHIP | 
| Friday, November 7, 2014 | ASSIGNED TO EXAMINER | 
| Friday, November 7, 2014 | APPROVED FOR PUB - PRINCIPAL REGISTER | 
| Wednesday, November 26, 2014 | NOTIFICATION OF NOTICE OF PUBLICATION E-MAILED | 
| Tuesday, December 16, 2014 | PUBLISHED FOR OPPOSITION | 
| Tuesday, December 16, 2014 | OFFICIAL GAZETTE PUBLICATION CONFIRMATION E-MAILED | 
| Tuesday, March 3, 2015 | REGISTERED-PRINCIPAL REGISTER | 
| Wednesday, November 23, 2016 | AUTOMATIC UPDATE OF ASSIGNMENT OF OWNERSHIP | 
| Tuesday, March 2, 2021 | TEAS SECTION 8 & 15 RECEIVED | 
| Monday, July 12, 2021 | NOTICE OF ACCEPTANCE OF SEC. 8 & 15 - E-MAILED | 
| Sunday, March 3, 2024 | COURTESY REMINDER - SEC. 8 (10-YR)/SEC. 9 E-MAILED | 
| Friday, September 19, 2025 | CANCELLED SEC. 8 (10-YR)/EXPIRED SECTION 9 | 
| Monday, July 12, 2021 | REGISTERED - SEC. 8 (6-YR) ACCEPTED & SEC. 15 ACK. | 
| Monday, July 12, 2021 | CASE ASSIGNED TO POST REGISTRATION PARALEGAL |