Patent US1800797A successfully refreshed from Google Patents.
US3846382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sterile medical dusting powder
Assignee: Wyeth Holdings LLC
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Filing: 1973-07-27
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Granted: 1974-11-05
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Expires: 1993-07-27
Abstract
Abstract This invention relates to a sterile medical dusting powder comprising a finely divided polyglycolic acid powdery material having more than 80%, by weight, of a particle size in the range of 1.5 to about 8 microns, less than 15%, by weight, of a particle size within the range of about 10 to 15 microns, and less than 1%, by weight, of the size of about 30 microns.
Inventors
- 👤 W Ramsey
- 👤 Lapp D De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:12
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/235; C07C59/245; C07C59/285; A; A61; A61L; A61L31/00; A61L31/04; A61L31/06; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A STERILE MEDICAL DUSTING POWDER COMPRISING A FINELY DIVIDED POLYGLYCOLIC ACID POWDERY MATERIAL HAVING MORE THAN 80%, BY WEIGHT, OF A PARTICLE SIZE IN THE RANGE OF 1.5 TO ABOUT 8 MICRONS, LESS THAN 15%, BY WEIGHT, OF A PARTICLE SIZE WITHIN THE RANGE OF ABOUT 10 TO 15 MICRONS, AND LESS THAN 1%, BY WEIGHT, OF THE SIZE OF ABOUT 20 MICRONS.
Claim 2
Dependent Claim
63 words
A STERILE MEDICAL DUSTING POWDER COMPRISING A FINELY DIVIDED POLYGLYCOLIC ACID POWDERY MATERIAL HAVING MORE THAN 80%, BY WEIGHT, OF A PARTICLE SIZE IN THE RANGE OF 1.5 TO ABOUT 8 MICRONS, LESS THAN 15%, BY WEIGHT, OF A PARTICLE SIZE WITHIN THE RANGE OF ABOUT 10 TO 15 MICRONS, AND LESS THAN 1%, BY WEIGHT, OF THE SIZE OF ABOUT 20 MICRONS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |