Chemical additive for gypsum products
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Sep 15, 2015
Grant Date -
Jan 8, 2015
app pub date -
Dec 3, 2012
filing date -
Dec 3, 2012
priority date (Note) -
In Force
status (Latency Note)
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Importance

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Abstract
The present invention provides a gypsum composition, a gypsum board and their preparation method and the use of DHA as an anti-sagging additive in a gypsum product. Said gypsum board comprises set gypsum prepared from the composition; while said composition comprises gypsum, and an anti-deformation additive, wherein the anti-deformation additive comprises at least one selected from a group consisting of dehydroascorbic acid, dehydroascorbate and semidehydroascorbic acid. The set gypsum prepared from the said composition shows better anti-sagging or deformation resisting property. The gypsum product of the present invention is hardly distorted and has stronger stability even in the condition of high humidity, thus improve the quality of the gypsum product to meet the demands of the customer.
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 | |
---|---|---|
SAINT-GOBAIN PLACO | TOUR SAINT-GOBAIN 12 PLACE DE L'IRIS COURBEVOIE 92400 |
International Classification(s)

- 2012 Application Filing Year
- C04B Class
- 940 Applications Filed
- 840 Patents Issued To-Date
- 89.37 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Gao, Xiaotong | Shanghai, CN | 5 | 4 |
# of filed Patents : 5 Total Citations : 4 | |||
Li, Huifen | Shanghai, CN | 7 | 24 |
# of filed Patents : 7 Total Citations : 24 | |||
Shao, Dongxiao | Shanghai, CN | 1 | 1 |
# of filed Patents : 1 Total Citations : 1 | |||
Song, Hao | Shanghai, CN | 92 | 455 |
# of filed Patents : 92 Total Citations : 455 | |||
Zhang, Ke | Shanghai, CN | 364 | 1936 |
# of filed Patents : 364 Total Citations : 1936 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 1 Citation Count
- C04B Class
- 16.97 % this patent is cited more than
- 10 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
---|---|---|---|---|
11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 15, 2027 |
Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
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 |
---|---|---|---|
Oct 21, 2019 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Oct 21, 2019 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Sep 15, 2019 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Sep 15, 2019 |
May 06, 2019 | FEPP | FEE PAYMENT PROCEDURE | free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Sep 15, 2015 | I | Issuance | |
Aug 26, 2015 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Jan 08, 2015 | P | Published | |
Feb 27, 2014 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GAO, XIAOTONG;SHAO, DONGXIAO;LI, HUIFEN;AND OTHERS;REEL/FRAME:033566/0413 Owner name: SAINT-GOBAIN PLACO, FRANCE Effective Date: Feb 27, 2014 |
Dec 03, 2012 | F | Filing | |
Dec 03, 2012 | PD | Priority Date |

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