US2581035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anion exchange resin antacid
Assignee: National Drug Co
•
Filing: 1949-03-26
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Granted: 1952-01-01
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Expires: 1969-03-26
Abstract
No abstract record available.
Inventors
- 👤 Gustav J Martin
- 👤 Wilkinson John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:03
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/13; A; A61; A61K; A61K47/00; A61K47/50; A61K47/51; A61K47/56; A61K47/58; A61K47/585
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A THERAPEUTICALLY ACTIVE ANION-EXCHANGE RESIN COMPOSITION PARTICULARLY ADAPTED FOR THE TREATMENT OF A PEPTIC AND DUODENAL ULCERS, COMPRISING A SOLID, FINELY DIVIDED, WATER-INSOLUBLE HIGH POLYMERIC CONDENSATION PRODUCT OF A PHENOL, FORMALDEHYDE AND AN ALKYLENE POLYAMINE, REDUCED TO A PARTICLE SIZE SUBSTANTIALLY THAT WHICH WILL PASS THROUGH A 200 MESH SCREEN OF THE U. S. SIEVE SERIES.
Claim 2
Dependent Claim
56 words
A THERAPEUTICALLY ACTIVE ANION-EXCHANGE RESIN COMPOSITION PARTICULARLY ADAPTED FOR THE TREATMENT OF A PEPTIC AND DUODENAL ULCERS, COMPRISING A SOLID, FINELY DIVIDED, WATER-INSOLUBLE HIGH POLYMERIC CONDENSATION PRODUCT OF A PHENOL, FORMALDEHYDE AND AN ALKYLENE POLYAMINE, REDUCED TO A PARTICLE SIZE SUBSTANTIALLY THAT WHICH WILL PASS THROUGH A 200 MESH SCREEN OF THE U. S. SIEVE SERIES.
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) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |