US4311528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Root filling paste for dental surgery
Assignee: Individual
•
Filing: 1980-08-05
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Granted: 1982-01-19
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Expires: 2000-08-05
Abstract
Abstract Disclosed is a root filling paste for dental surgery, containing calcium hydroxide, an X-ray contrast agent and oleum pedum tauri as the paste matrix or base, respectively. The addition of oleum pedum tauri permits the calcium hydroxide which could heretofore be filled into root canals with difficulty only, to be filled evenly and in sealingly filling manner into the root canals of gangrenous teeth. The anti-inflammatory and osteo-regenerating activity of calcium hydroxide may in this way come into effect regularly.
Inventors
- 👤 Georg Dietz
- 👤 Hans-Helmut Barth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:45
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/60; A61K6/69
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
40 words
A root filling paste for dental surgery comprising from about 45 to 65% by weight calcium hydroxide, from about 13 to 33% by weight of an X-ray contrast agent, and from about 12 to 32% by weight oleum pedum tauri.
Claim 2
Dependent Claim
40 words
A root filling paste for dental surgery comprising from about 45 to 65% by weight calcium hydroxide, from about 13 to 33% by weight of an X-ray contrast agent, and from about 12 to 32% by weight oleum pedum tauri.
Claim 3
Dependent Claim
15 words
The root filling paste of claim 1 wherein said X-ray contrast agent is barium sulfate.
Claim 4
Dependent Claim
15 words
The root filling paste of claim 1 further including an effective amount of vitamin B.
Claim 5
Dependent Claim
46 words
The root filing paste of claim 2 wherein said calcium hydroxide is present at from 50 to 60% by weight; said barium sulfate is present at from 18 to 28% by weight, and said oleum pedum tauri is present at from 17 to 27% by weight.
Claim 6
Dependent Claim
46 words
The root filling paste of claim 1 wherein said calcium hydroxide is present at from 53 to 57% by weight; said barium sulfate is present at from 21 to 25% by weight, and said oleum pedum tauri is present at from 20 to 24% by weight.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-18 | 1985-07-20 | 1986-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-18 | 1989-07-20 | 1990-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-18 | 1993-07-20 | 1994-01-19 | $7700.00 | Window Closed / Lapsed |