IP Library Granted Patent US 6,481,221
Granted Patent Utility
US 6,481,221 · Confirmation No. 3042

APPARATUS AND METHODS FOR PLACING AN ADDITIVE FLUID INTO A REFRIGERANT CIRCUIT

⬇ PDF
Code Description Pages PDF
2022-05-10 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2022-05-10 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2022-05-03 PA.. Power of Attorney 1 View
2022-05-03 N417 Electronic Filing System Acknowledgment Receipt 2 View
2022-05-03 R3.73 Assignee showing of ownership per 37 CFR 3.73 3 View
2020-01-27 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2020-01-27 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2020-01-14 PA.. Power of Attorney 1 View
2020-01-14 R3.73 Assignee showing of ownership per 37 CFR 3.73 3 View
2020-01-14 N417 Electronic Filing System Acknowledgment Receipt 2 View
2019-02-12 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2019-02-12 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2019-01-25 PA.. Power of Attorney 1 View
2019-01-25 R3.73 Assignee showing of ownership per 37 CFR 3.73 2 View
2019-01-25 N417 Electronic Filing System Acknowledgment Receipt 2 View
2018-06-13 MFEE.C.AD Maintenance Fee Address Change 1 View
2018-06-13 N417 Electronic Filing System Acknowledgment Receipt 2 View
2015-10-16 SES.LOSS.ELC Notification of loss of entitlement to small entity status via Patent Application Information Retrieval (PAIR) 1 View
2015-08-10 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2015-08-10 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2015-08-05 PA.. Power of Attorney 1 View
2015-08-05 R3.73 Assignee showing of ownership per 37 CFR 3.73 4 View
2015-08-05 N417 Electronic Filing System Acknowledgment Receipt 2 View
2015-08-05 PA.. Power of Attorney 1 View
2001-03-08 TRNA Transmittal of New Application 1 View
2001-03-08 SPEC Specification 9 View
2001-03-08 CLM Claims 6 View
2001-03-08 ABST Abstract 1 View
2001-03-08 TRNA Transmittal of New Application 1 View
2001-03-08 SPEC Specification 9 View
2001-03-08 CLM Claims 6 View
2001-03-08 ABST Abstract 1 View
2001-03-08 DRW Drawings-only black and white line drawings 2 View
2001-03-08 OATH Oath or Declaration filed 3 View
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this application's details
Quick Facts
Patent No.
US 6,481,221
App. No.
09/802,178
Filed
2001-03-08
Granted
2002-11-19
Pub. No.
US20020124577A1
Art Unit
3744
PTA
-170 days