US2831749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sterilizing plaster of paris surgical dressings
Assignee: Johnson and Johnson
•
Filing: 1954-11-15
•
Granted: 1958-04-22
•
Expires: 1974-11-15
Abstract
No abstract record available.
Inventors
- 👤 Armand M Marinaro
- 👤 Brickman Leo
- 👤 Holden Jane E Smith
- 👤 Mary Anne D Vickery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:42
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/04; A61L; A61L2/00; A61L2/16; A61L2/20; A61L2/204
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
THE METHOD OF STERILIZING PLASTER OF PARIS WHICH COMPRISES TREATING SAID PLASTER OF PARIS IN AN ENCLOSED SPACE WITH WATER VAPOR IN AN AMOUNT IN THE RANGE OF ABOUT 0.13 TO 1.1 PARTS BY WEIGHT PER 100 PARTS OF PLASTER OF PARIS, A FORMALDEHYDE PROVIDING MATERIAL IN AN AMOUNT TO PROVIDE UNDER THE TREATING CONDITIONS AN AMOUNT OF FORMALDEHYDE IN THE RANGE OF ABOUT 0 TO ABOUT 0.13 PART PER 100 PARTS OF PLASTER OF PARIS, AT A TEMPERATURE IN THE RANGE OF ABOUT 212 TO 290*F., FOR A TIME IN THE RANGE OF ABOUT 1 TO 3 HOURS, WHEREBY A STERILIZED PLASTER OF PARIS IS OBTAINED HAVING A SETTING TIME NOT OVER ABOUT 22 MINUTES.
Claim 2
Independent Claim
116 words
THE METHOD OF STERILIZING PLASTER OF PARIS WHICH COMPRISES TREATING SAID PLASTER OF PARIS IN AN ENCLOSED SPACE WITH WATER VAPOR IN AN AMOUNT IN THE RANGE OF ABOUT 0.13 TO 1.1 PARTS BY WEIGHT PER 100 PARTS OF PLASTER OF PARIS, A FORMALDEHYDE PROVIDING MATERIAL IN AN AMOUNT TO PROVIDE UNDER THE TREATING CONDITIONS AN AMOUNT OF FORMALDEHYDE IN THE RANGE OF ABOUT 0 TO ABOUT 0.13 PART PER 100 PARTS OF PLASTER OF PARIS, AT A TEMPERATURE IN THE RANGE OF ABOUT 212 TO 290*F., FOR A TIME IN THE RANGE OF ABOUT 1 TO 3 HOURS, WHEREBY A STERILIZED PLASTER OF PARIS IS OBTAINED HAVING A SETTING TIME NOT OVER ABOUT 22 MINUTES.
References Cited (Backward Citations)
US830831A
Cited
US855942A
Cited
US1111055A
Cited
US1837264A
Cited
US2009597A
Cited
GB510273A
Cited
US2376611A
Cited
US2344536A
Cited
US2477964A
Cited
US2472011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |