US2654736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized starch derivatives
Assignee: NAT STARCH PRODUCTS Inc
•
Filing: 1949-02-02
•
Granted: 1953-10-06
•
Expires: 1969-02-02
Abstract
No abstract record available.
Inventors
- 👤 Carlyle G Caldwell
- 👤 Otto B Wurzburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:26
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/02; C08B31/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
THE METHOD OF MAKING A STARCH DERIVATIVE WHICH CONSISTS IN REACTING STARCH IN THE PRESENCE OF MOISTURE WITH A BETA-LACTONE.
Claim 2
Independent Claim
20 words
THE METHOD OF MAKING A STARCH DERIVATIVE WHICH CONSISTS IN REACTING STARCH IN THE PRESENCE OF MOISTURE WITH A BETA-LACTONE.
References Cited (Backward Citations)
US2148951A
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US2412213A
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US2352641A
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US2316128A
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US2316129A
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US2399455A
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US2462210A
Cited
US2526554A
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US2455731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |