| Serial Number | 72392377 |
| Word Mark | DUO-CHEK |
| Filing Date | Tuesday, May 18, 1971 |
| Status | 800 - REGISTERED AND RENEWED |
| Status Date | Saturday, April 23, 2022 |
| Registration Number | 0928279 |
| Registration Date | Tuesday, February 1, 1972 |
| Mark Drawing | 1000 - Typeset: Word(s) / letter(s) / number(s) |
| Published for Opposition Date | NOT AVAILABLE |
| Goods and Services | REFRACTOMETERS |
| Pseudo Mark | DUO-CHECK |
| International Class | 009 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire extinguishing apparatus. |
| US Class Codes | 026 |
| Class Status Code | 6 - Active |
| Class Status Date | Tuesday, March 1, 1983 |
| Primary Code | 026 |
| First Use Anywhere Date | Monday, March 31, 1969 |
| First Use In Commerce Date | Monday, March 31, 1969 |
| Party Name | Reichert, Inc. |
| Party Type | 45 - New Owner After Registration |
| Legal Entity Type | 03 - Corporation |
| Address | Depew, NY 14043 |
| Party Name | LEICA MICROSYSTEMS INC. |
| Party Type | 44 - New Owner After Registration |
| Legal Entity Type | 03 - Corporation |
| Address | DEPEW, NY 14221 |
| Party Name | LEICA INC. |
| Party Type | 43 - New Owner After Registration |
| Legal Entity Type | 03 - Corporation |
| Address | BUFFALO, NY 14215 |
| Party Name | AMERICAN OPTICAL CORPORATION |
| Party Type | 30 - Original Registrant |
| Legal Entity Type | 03 - Corporation |
| Address | SOUTHBRIDGE, MA 01550 |
| Event Date | Event Description |
| Sunday, April 24, 2022 | NOTICE OF ACCEPTANCE OF SEC. 8 & 9 - E-MAILED |
| Saturday, April 23, 2022 | REGISTERED AND RENEWED (FOURTH RENEWAL - 10 YRS) |
| Saturday, April 23, 2022 | REGISTERED - SEC. 8 (10-YR) ACCEPTED/SEC. 9 GRANTED |
| Saturday, April 23, 2022 | CASE ASSIGNED TO POST REGISTRATION PARALEGAL |
| Monday, December 27, 2021 | TEAS SECTION 8 & 9 RECEIVED |
| Monday, February 1, 2021 | COURTESY REMINDER - SEC. 8 (10-YR)/SEC. 9 E-MAILED |
| Sunday, March 11, 2018 | APPLICANT/CORRESPONDENCE CHANGES (NON-RESPONSIVE) ENTERED |
| Sunday, March 11, 2018 | TEAS CHANGE OF OWNER ADDRESS RECEIVED |
| Sunday, March 11, 2018 | TEAS CHANGE OF CORRESPONDENCE RECEIVED |
| Thursday, March 1, 2012 | NOTICE OF ACCEPTANCE OF SEC. 8 & 9 - E-MAILED |
| Thursday, March 1, 2012 | REGISTERED AND RENEWED (THIRD RENEWAL - 10 YRS) |
| Thursday, March 1, 2012 | REGISTERED - SEC. 8 (10-YR) ACCEPTED/SEC. 9 GRANTED |
| Wednesday, February 29, 2012 | CASE ASSIGNED TO POST REGISTRATION PARALEGAL |
| Monday, January 30, 2012 | TEAS SECTION 8 & 9 RECEIVED |
| Wednesday, October 19, 2011 | ASSIGNMENT OF OWNERSHIP NOT UPDATED AUTOMATICALLY |
| Friday, September 12, 2008 | CASE FILE IN TICRS |
| Thursday, June 7, 2007 | TEAS CHANGE OF CORRESPONDENCE RECEIVED |
| Friday, February 22, 2002 | REGISTERED AND RENEWED (SECOND RENEWAL - 10 YRS) |
| Friday, February 22, 2002 | REGISTERED - SEC. 8 (10-YR) ACCEPTED/SEC. 9 GRANTED |
| Wednesday, December 19, 2001 | REGISTERED - COMBINED SECTION 8 (10-YR) & SEC. 9 FILED |
| Wednesday, April 8, 1992 | REGISTERED AND RENEWED (FIRST RENEWAL - 10 YRS) |
| Friday, December 20, 1991 | REGISTERED - SEC. 9 FILED/CHECK RECORD FOR SEC. 8 |
| Monday, March 13, 1978 | REGISTERED - SEC. 8 (6-YR) ACCEPTED & SEC. 15 ACK. |