Patent US3069411A successfully refreshed from Google Patents.
US3069411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modification of starch with phosphates and amides
Assignee: Penick and Ford Ltd Inc
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Filing: 1960-04-14
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Granted: 1962-12-18
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Expires: 1980-04-14
Abstract
No abstract record available.
Inventors
- 👤 Erling T Hjermstad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:57
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/02; C08B31/06; C08B31/066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
THE METHOD OF MODIFYING STARCHES WITH PHOSPHATES AND AMIDES CHARACTERIZED BY THE PRODUCTION OF NITROEN AND PHOSPHORUS CONTAINING STARCH DERIVATIVES IN THE NATIVE, WHITE, UNGELATINIZED, GRANULE FORM, COMPRISING FORMING AN INTIMATE MIXTURE OF STARCH WITH A WATER-SOLUBLE INORGANIC PHOSPHATE SALT CONTAINING AT LEAST 1 HYDROXYL GROUP AND WITH A WATER-SOLUBLE ORGANIC AMIDE CONTAINING A
Claim 2
Independent Claim
54 words
THE METHOD OF MODIFYING STARCHES WITH PHOSPHATES AND AMIDES CHARACTERIZED BY THE PRODUCTION OF NITROEN AND PHOSPHORUS CONTAINING STARCH DERIVATIVES IN THE NATIVE, WHITE, UNGELATINIZED, GRANULE FORM, COMPRISING FORMING AN INTIMATE MIXTURE OF STARCH WITH A WATER-SOLUBLE INORGANIC PHOSPHATE SALT CONTAINING AT LEAST 1 HYDROXYL GROUP AND WITH A WATER-SOLUBLE ORGANIC AMIDE CONTAINING A
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) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |