Patent US4609205A successfully refreshed from Google Patents.
Patent US2650177A successfully refreshed from Google Patents.
US2650177A
Expired / Lapsed
US
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Resin purification of sugar solutions
Assignee: N V Octrooien Activit Mij
•
Filing: 1946-09-12
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Granted: 1953-08-25
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Expires: 1966-09-12
Abstract
No abstract record available.
Inventors
- 👤 Meijer Hendrik Willem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:08
CPC Classifications
C; C13; C13B; C13B20/00; C13B20/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
PROCESS FOR THE REMOVAL OF IMPURITIES OF ORGANIC NATURE FROM A MOLASSES SOLUTION WHICH COMPRISES CONTACTING SAID SOLUTION WITH AN UNDRIED RESIN RESULTING FROM THE CONDENSATION OF A MIXTURE OF RESORCINOL AND META-PHENYLENE DIAMINE WITH FORMALDEHYDE IN THE PRESENCE OF A QUANTITY OF WATER SUFFICIENT TO PROVIDE DESIRED POROSITY AND MAINTAINING SAID RESIN IN A MOIST CONDITION UNTIL SAID CONTACT IS EFFECTED.
Claim 2
Dependent Claim
62 words
PROCESS FOR THE REMOVAL OF IMPURITIES OF ORGANIC NATURE FROM A MOLASSES SOLUTION WHICH COMPRISES CONTACTING SAID SOLUTION WITH AN UNDRIED RESIN RESULTING FROM THE CONDENSATION OF A MIXTURE OF RESORCINOL AND META-PHENYLENE DIAMINE WITH FORMALDEHYDE IN THE PRESENCE OF A QUANTITY OF WATER SUFFICIENT TO PROVIDE DESIRED POROSITY AND MAINTAINING SAID RESIN IN A MOIST CONDITION UNTIL SAID CONTACT IS EFFECTED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |