Patent Application
Utility
App. No. 10/021,397
· Confirmation No. 3613
EFFICIENT DIGITAL ITU-COMPLIANT ZERO-BUFFERING DTMF DETECTION USING THE NON-UNIFORM DISCRETE FOURIER TRANSFORM
Patent Expired Due to NonPayment of Maintenance Fees Under 37 CFR 1.362
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Code | Description | Pages | ||
|---|---|---|---|---|---|
| 2001-12-07 | TRNA |
Transmittal of New Application | 2 | View | |
| 2001-12-07 | SPEC |
Specification | 39 | View | |
| 2001-12-07 | CLM |
Claims | 5 | View | |
| 2001-12-07 | ABST |
Abstract | 1 | View | |
| 2001-12-07 | DRW |
Drawings-only black and white line drawings | 9 | View | |
| 2001-12-07 | OATH |
Oath or Declaration filed | 1 | View | |
| 2001-12-07 | LET. |
Miscellaneous Incoming Letter | 3 | View |
Inventors
Attorneys & Agents of Record
Classification
USPC
379/386
H04M7/1295
H04Q1/4575
Prosecution
- Examiner
- ENG, GEORGE
- Art Unit
- 2643
- Docket No.
- UTAU001-US1
- Confirmation No.
- 3613
Publication
- Pub. No.
- US20020080954A1
- Pub. Date
- 2002-06-27
Patent Term Adjustment
-72days
RELEASE OF U.S. PATENT AGREEMENT (FOR NON-U.S. GRANTORS)
Recorded 2018-10-12
U.S. PATENT SECURITY AGREEMENT (FOR NON-U.S. GRANTORS)
Recorded 2014-09-09
CHANGE OF ADDRESS
Recorded 2014-09-03
CONVERSANT INTELLECTUAL PROPERTY MANAGEMENT INC.,
CONVERSANT IP N.B. 868 INC.,
CONVERSANT IP N.B. 276 INC.
from
ROYAL BANK OF CANADA
RELEASE OF SECURITY INTEREST
Recorded 2014-08-07
CHANGE OF NAME
Recorded 2014-03-13
U.S. INTELLECTUAL PROPERTY SECURITY AGREEMENT (FOR NON-U.S. GRANTORS) - SHORT FORM
Recorded 2012-01-10
CHANGE OF ADDRESS OF ASSIGNEE
Recorded 2009-04-15
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded 2008-08-26
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded 2001-12-07
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Quick Facts
- App. No.
- 10/021,397
- Filed
- 2001-12-07
- Granted
- 2003-08-19
- Pub. No.
- US20020080954A1
- Examiner
- ENG, GEORGE
- Art Unit
- 2643
- PTA
- -72 days
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