Drumhead
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jan 26, 1999
Grant Date -
N/A
app pub date -
May 15, 1997
filing date -
May 15, 1997
priority date (Note) -
Expired
status (Latency Note)
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Importance

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Abstract
A polymer film drumhead having indentations in the surface, the indentations placed strategically by size, number and placement near the periphery of the drumhead to control the vibrational characteristics and the overtone content of the drumhead when struck.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
D'ADDARIO & COMPANY INC | 595 SMITH STREET FARMINGDALE NY 11735 |
International Classification(s)

- 1997 Application Filing Year
- G10D Class
- 141 Applications Filed
- 45 Patents Issued To-Date
- 31.92 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Gatzen, Robert A | Newington, CT | 14 | 194 |
# of filed Patents : 14 Total Citations : 194 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 16 Citation Count
- G10D Class
- 57.38 % this patent is cited more than
- 26 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

Legal Events
Date | Code | Event | Description |
---|---|---|---|
Mar 04, 2013 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Feb 06, 2013 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Feb 06, 2013 |
Feb 06, 2013 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | |
Sep 17, 2012 | REMI | MAINTENANCE FEE REMINDER MAILED | |
Aug 05, 2008 | FPAY | FEE PAYMENT | year of fee payment: 8 |
Jun 26, 2006 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MBH FILTRATION GMBH & CO. KG;REEL/FRAME:018120/0197 Owner name: BLUCHER GMBH, GERMANY Effective Date: Jun 26, 2006 |
Jul 30, 2004 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Feb 06, 2001 | I | Issuance | |
Dec 04, 2000 | FEPP | FEE PAYMENT PROCEDURE | free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
Sep 20, 1999 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:VON BLUECHER, HASSO;DE RUITER, ERNEST;REEL/FRAME:010238/0758;SIGNING DATES FROM 19990830 TO 19990906 Owner name: MHB FILTRATION GMBH & CO. KG, GERMANY |
Jun 23, 1999 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:VON BLUECHER, HASSO;DE RUITER, ERNEST;REEL/FRAME:010033/0765;SIGNING DATES FROM 19990531 TO 19990602 Owner name: MHB FILTRATION GMBH & CO, GERMANY |
Aug 27, 1997 | F | Filing | |
Feb 28, 1992 | PD | Priority Date |

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