Patent US4153496A successfully refreshed from Google Patents.
US2626257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical dusting powder
Assignee: Johnson and Johnson
•
Filing: 1952-05-21
•
Granted: 1953-01-20
•
Expires: 1972-05-21
Abstract
No abstract record available.
Inventors
- 👤 Carlyle G Caldwell
- 👤 White Thomas Aubrey
- 👤 William L George
- 👤 James J Eberl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:36
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0014; A61K47/00; A61K47/30; A61K47/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A MEDICAL DUSTING POWDER COMPRISING A STARCH POWDER IN ITS NON-GELATINIZED STATE PARTIALLY ETHERIFIED TO A DEGREE CORRESPONDING TO TREATMENT IN AQUEOUS SUSPENSION WITH AN AGENT CAUSING FORMATION OF DIETHER LINKAGES WHEREIN CHAINS HAVING MORE THAN ONE CARBON SEPARATE THE OXYGEN BONDS, IN AN AMOUNT SUFFICIENT TO LINK 2-3 PER CENT OF THE FREE HYDROXYL GROUPS, SAID DUSTING POWDER COMPRISING FROM ABOUT 0.05 TO ABOUT 10 PER CENT OF ITS WEIGHT OF MAGNESIUM OXIDE.
Claim 2
Dependent Claim
74 words
A MEDICAL DUSTING POWDER COMPRISING A STARCH POWDER IN ITS NON-GELATINIZED STATE PARTIALLY ETHERIFIED TO A DEGREE CORRESPONDING TO TREATMENT IN AQUEOUS SUSPENSION WITH AN AGENT CAUSING FORMATION OF DIETHER LINKAGES WHEREIN CHAINS HAVING MORE THAN ONE CARBON SEPARATE THE OXYGEN BONDS, IN AN AMOUNT SUFFICIENT TO LINK 2-3 PER CENT OF THE FREE HYDROXYL GROUPS, SAID DUSTING POWDER COMPRISING FROM ABOUT 0.05 TO ABOUT 10 PER CENT OF ITS WEIGHT OF MAGNESIUM OXIDE.
References Cited (Backward Citations)
US982673A
Cited
AT91411B
Cited
US2459108A
Cited
US2451686A
Cited
US2417611A
Cited
US2500950A
Cited
US2469957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-20 | 1956-07-21 | 1957-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-20 | 1960-07-21 | 1961-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-20 | 1964-07-21 | 1965-01-20 | $7700.00 | Window Closed / Lapsed |