Patent US2516632A successfully refreshed from Google Patents.
US2516632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starch ethers in original granule form
Assignee: Penick and Ford Ltd Inc
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Filing: 1946-08-07
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Granted: 1950-07-25
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Expires: 1966-08-07
Abstract
No abstract record available.
Inventors
- 👤 Carl C Kesler
- 👤 Erling T Hjermstad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:14
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A PROCESS FOR PREPARING PARTIAL ETHERS OF GRANULE, CEREAL STARCH BY DIRECT ALKYLATION WITH ALKYLENE OXIDES, THE STEPS OF BRINGING INTO CONTACT WITH GRANULE, CEREAL STARCH HAVING FROM 3% TO 15% MOISTURE, FROM 1% TO 5% BY WEIGHT OF AN ALKYLENE OXIDE IN WHICH THE OXYGEN IS LINKED TO ADJACENT CARBON HYDROGEN GROUPS, AND AGITATING THE MIXTURE IN A CLOSED ZONE UNTIL SUBSTANTIALLY NO FREE ALKYLENE OXIDE REMAINS.
Claim 2
Dependent Claim
69 words
IN A PROCESS FOR PREPARING PARTIAL ETHERS OF GRANULE, CEREAL STARCH BY DIRECT ALKYLATION WITH ALKYLENE OXIDES, THE STEPS OF BRINGING INTO CONTACT WITH GRANULE, CEREAL STARCH HAVING FROM 3% TO 15% MOISTURE, FROM 1% TO 5% BY WEIGHT OF AN ALKYLENE OXIDE IN WHICH THE OXYGEN IS LINKED TO ADJACENT CARBON HYDROGEN GROUPS, AND AGITATING THE MIXTURE IN A CLOSED ZONE UNTIL SUBSTANTIALLY NO FREE ALKYLENE OXIDE REMAINS.
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) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |