US4931272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tooth pastes, cleaning agent for tooth pastes based on dicalcium phosphate-dihydrate, and process for making such cleaning agent
Assignee: Hoechst AG
•
Filing: 1988-02-10
•
Granted: 1990-06-05
•
Expires: 2008-02-10
Abstract
Abstract Tooth pastes contain a cleaning agent consisting of dicalcium phosphate-dihydrate. The cleaning agent has an adsorptive power of more than 60 g H 2 /100 g. Disclosed is the cleaning agent and a process for making it.
Inventors
- 👤 Franz-Josef Dany
- 👤 Horst Klassen
- 👤 Renate Adrian
- 👤 Hedwig Prell
- 👤 Gerhard Kalteyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:48
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/24; A61Q; A61Q11/00; C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/32; C01B25/322
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
32 words
A tooth paste of dicalcium phosphate dihydrate containing a cleaning agent consisting essentially of dicalcium phosphate dihydrate having an adsorptive power of more than 60 g H 2 O/100 g cleaning agent.
Claim 2
Dependent Claim
32 words
A tooth paste of dicalcium phosphate dihydrate containing a cleaning agent consisting essentially of dicalcium phosphate dihydrate having an adsorptive power of more than 60 g H 2 O/100 g cleaning agent.
Claim 3
Dependent Claim
36 words
A tooth paste as claimed in claim 1, wherein the cleaning agent further consists of 90 to 98 wgt % CaHPO 4 ·2H 2 O, the balance being MgHPO 4 ·3H 2 O and sodium pyrophosphate.
Claim 4
Dependent Claim
35 words
A tooth paste as claimed in claim 1, wherein the cleaning agent has a maximum particle size of 100 μm and a particle size distribution of at least 99.95%<75 μm, 99.0%<45 μm, and 50.0%<20 μm.
Claim 5
Dependent Claim
23 words
A cleaning agent of dicalcium phosphate dihyhrate characterized by an adsorptive power of more than 60 g H 2 O/100 g cleaning agent.
Claim 6
Dependent Claim
23 words
A cleaning agent of dicalcium phosphate dihyhrate characterized by an adsorptive power of more than 60 g H 2 O/100 g cleaning agent.
Claim 7
Dependent Claim
31 words
A cleaning agent as claimed in claim 4, consisting of 99 to 98 wgt % CaHPO 4 ·2H 2 O, the balance being MgHPO 4 ·3H 2 O and sodium pyrophosphate.
Claim 8
Dependent Claim
33 words
A cleaning agent as claimed in claim 4, characterized by a particle size of at most 100 μm and a particle size distribution of at least 99.95%<75 μm, 99.0%<45 μm, and 50.0%<20 μm.
Claim 9
Dependent Claim
87 words
A tooth paste containing metal phosphate as a cleaning agent, wherein the cleaning agent consists of 90 to 98 wgt % CaHPO 4 ·2H 2 O, the balance being MgHPO 4 ·3H 2 O and Na 4 P 2 O 7 , the cleaning agent having an adsorptive power of more than 60 g to 135 g H 2 O/100 g cleaning agent, the cleaning agent having a particle size distribution of at least 99.95 wgt %<75 μm, 99.0 wgt %<45 μm, and 50.0 wgt %<20 μm.
Claim 10
Dependent Claim
87 words
A tooth paste containing metal phosphate as a cleaning agent, wherein the cleaning agent consists of 90 to 98 wgt % CaHPO 4 ·2H 2 O, the balance being MgHPO 4 ·3H 2 O and Na 4 P 2 O 7 , the cleaning agent having an adsorptive power of more than 60 g to 135 g H 2 O/100 g cleaning agent, the cleaning agent having a particle size distribution of at least 99.95 wgt %<75 μm, 99.0 wgt %<45 μm, and 50.0 wgt %<20 μm.
References Cited (Backward Citations)
US4002732A
Cited
DE2648061A1
Cited
GB1548465A
Cited
US4118471A
Cited
EP0017784A1
Cited
EP0040938A2
Cited
US4716034A
Cited
US4728508A
Cited
US4765984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |