US2898373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of panthenol
Assignee: F Hoffmann La Roche AG
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Filing: 1957-08-29
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Granted: 1959-08-04
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Expires: 1977-08-29
Abstract
No abstract record available.
Inventors
- 👤 Klaui Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:39
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/16; A61K31/165; A01; A01N; A01N25/00; A01N25/02; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/42; A61Q; A61Q17/00; A61Q19/00; A61Q19/10; A61Q5/00; A61Q5/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
40 words
A STABILIZED AQUEOUS SOLUTION COMPRISING PANTHENOL WHEREIN THE STABILIZER FOR PANTHENOL IS A MEMBER OF THE GROUP CONSISTING OF A LACTONE OF A HYDROXYCARBOXYLIC ACID, SAID LACTONE CONTAINING 4 TO 6 CARBON ATOMS IN THE LACTONE RING, AND POLYLACTIC ACID.
Claim 2
Dependent Claim
40 words
A STABILIZED AQUEOUS SOLUTION COMPRISING PANTHENOL WHEREIN THE STABILIZER FOR PANTHENOL IS A MEMBER OF THE GROUP CONSISTING OF A LACTONE OF A HYDROXYCARBOXYLIC ACID, SAID LACTONE CONTAINING 4 TO 6 CARBON ATOMS IN THE LACTONE RING, AND POLYLACTIC ACID.
Claim 3
Dependent Claim
23 words
A STABILIZED AQUEOUS PANTHENOL SOLUTION WHEREIN THE PANTHENOL IS STABILIZED BY THE PRESENCE OF ABOUT 2 TO ABOUT 25% BY WEIGHT OF Y-BUTYROLACTONE.
Claim 4
Dependent Claim
23 words
A STABILIZED AQUEOUS PANTHENOL SOLUTION WHEREIN THE PANTHENOL IS STABILIZED BY THE PRESENCE OF ABOUT 2 TO ABOUT 25% BY WEIGHT OF Y-BUTYROLACTONE.
References Cited (Backward Citations)
US2413077A
Cited
US2813123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |