US2631155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystalline calcium ascorbate
Assignee: PHYSIOLOGICAL CHEMICAL Co
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Filing: 1946-10-03
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Granted: 1953-03-10
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Expires: 1966-10-03
Abstract
No abstract record available.
Inventors
- 👤 Simon L Ruskin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:20
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
PROCESS FOR THE MANUFACTURE OF A NEW AND STABLE FORM OF CALCIUM ASCORBATE, WHICH COMPRISES MIXING A SOLUTION OF CALCIUM ASCORBATE IN WATER WITH A QUANTITY OF ACETONE INSUFFICIENT TO CAUSE PRECIPITATION OF THE CALCIUM ASCORBATE, AND SEEDING THE SOLUTION WITH CALCIUM ASCORBATE CRYSTALS TO CAUSE THE FORMATION OF A CRYSTALLINE PRECIPITATE OF CALCIUM ASCORBATE DIHYDRATE.
Claim 2
Dependent Claim
56 words
PROCESS FOR THE MANUFACTURE OF A NEW AND STABLE FORM OF CALCIUM ASCORBATE, WHICH COMPRISES MIXING A SOLUTION OF CALCIUM ASCORBATE IN WATER WITH A QUANTITY OF ACETONE INSUFFICIENT TO CAUSE PRECIPITATION OF THE CALCIUM ASCORBATE, AND SEEDING THE SOLUTION WITH CALCIUM ASCORBATE CRYSTALS TO CAUSE THE FORMATION OF A CRYSTALLINE PRECIPITATE OF CALCIUM ASCORBATE DIHYDRATE.
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) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |