US2500113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moldable condensation products of silvered formaldehyde
Assignee: Wyeth Holdings LLC
•
Filing: 1947-03-21
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Granted: 1950-03-07
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Expires: 1967-03-21
Abstract
No abstract record available.
Inventors
- 👤 Reginald M Banks
- 👤 Robert B Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:26
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/40; A; A61; A61L; A61L2/00; A61L2/16; A61L2/23; A61L2/238; C08G12/26; C08G12/30; C08G12/32; C08G8/00; C08G8/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A PROCESS OF PREPARING A MOLDING COMPOSITION WHICH COMPRISES CONTACTING AQUEOUS FORMALDEHYDE WITH A SILVERED ION EXCHANGE RESIN UNTIL SAID FORMALDEHYDE CONTAINS SILVER WHICH IS IN A GERMICIDALLY ACTIVE STATE AND CONDENSING THE SILVERED AQUEOUS FORMALDEHYDE OBTAINED WITH A COMPOUND CAPABLE OF FORMING THEREWITH A MOLDABLE THERMOSETTING CONDENSATION PRODUCT AND SELECTED FROM THE GROUP CONSISTING OF AMINO COMPOUNDS, AMIDO COMPOUNDS AND PHENOL.
Claim 2
Dependent Claim
62 words
A PROCESS OF PREPARING A MOLDING COMPOSITION WHICH COMPRISES CONTACTING AQUEOUS FORMALDEHYDE WITH A SILVERED ION EXCHANGE RESIN UNTIL SAID FORMALDEHYDE CONTAINS SILVER WHICH IS IN A GERMICIDALLY ACTIVE STATE AND CONDENSING THE SILVERED AQUEOUS FORMALDEHYDE OBTAINED WITH A COMPOUND CAPABLE OF FORMING THEREWITH A MOLDABLE THERMOSETTING CONDENSATION PRODUCT AND SELECTED FROM THE GROUP CONSISTING OF AMINO COMPOUNDS, AMIDO COMPOUNDS AND PHENOL.
References Cited (Backward Citations)
US2434190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |