US2494912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Higher alkylene glycol esters of alginic acid
Assignee: Kelco Co
•
Filing: 1947-01-20
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Granted: 1950-01-17
•
Expires: 1967-01-20
Abstract
No abstract record available.
Inventors
- 👤 Arnold B Steiner
- 👤 William H Mcneely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:09
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/006; C08B37/0084; C09; C09K; C09K23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
THE METHOD OF MODIFYING ALGINIC ACID TO RENDER IT WATER-SOLUBLE WHICH COMPRISES; TREATING SAID ACID WITH A 1,2 ALKYLENE OXIDE CONTAINING NOT LESS THAN SIX NOR MORE THAN EIGHTEEN CARBON ATOMS, IN THE PRESENCE OF WATER AND OF A MUTUAL SOLVENT FOR WATER AND FOR SAID OXIDE.
Claim 2
Independent Claim
47 words
THE METHOD OF MODIFYING ALGINIC ACID TO RENDER IT WATER-SOLUBLE WHICH COMPRISES; TREATING SAID ACID WITH A 1,2 ALKYLENE OXIDE CONTAINING NOT LESS THAN SIX NOR MORE THAN EIGHTEEN CARBON ATOMS, IN THE PRESENCE OF WATER AND OF A MUTUAL SOLVENT FOR WATER AND FOR SAID OXIDE.
References Cited (Backward Citations)
US2426125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |