Patent US2833670A successfully refreshed from Google Patents.
US2833670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
After-treatment of textile fabric having cured formaldehyde liberating resins and article formed thereby
Assignee: Wyeth Holdings LLC
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Filing: 1956-06-13
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Granted: 1958-05-06
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Expires: 1976-06-13
Abstract
No abstract record available.
Inventors
- 👤 Philip B Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:26
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/432; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2861; Y10T442/2893
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR REDUCING THE AMOUNT OF FORMALDEHYDE LIBERATED FROM A FABRIC HAVING A CURED FORMALDEHYDE LIBERATING RESIN THEREON, SAID CURED RESIN BEING CAPABLE OF LIBERATING FORMALDEHYDE IN AMOUNTS IN EXCESS OF 0.3% BASED ON THE WEIGHT OF THE FABRIC WHEN STORED FOR 20 HOURS AT 100*F. AND AT 100% RELATIVE HUMIDITY, WHICH COMPRISES AFTER-TREATING SAID RESIN-TREATED FABRIC WITH AN AMOUNT OF A FORMALDEHYDE ACCEPTOR, SAID FORMALDEHYDE ACCEPTOR BEING A NITROGENOUS COMPOUND CAPABLE OF REACTING WITH FORMALDEHYDE TO FORM A CONDENSATION PRODUCT, SAID AMOUNT BEING SUFFICIENT TO REDUCE THE AMOUNT OF FORMALDEHYDE LIBERATED WHEN FABRIC SO TREATED IS STORED FOR 20 HOURS AT 100*F. AND 100% RELATIVE HUMIDITY TO 0.3% AND LESS BASED ON THE WEIGHT OF THE FABRIC, AND THEREAFTER DRYING THE FABRIC.
Claim 2
Dependent Claim
124 words
A PROCESS FOR REDUCING THE AMOUNT OF FORMALDEHYDE LIBERATED FROM A FABRIC HAVING A CURED FORMALDEHYDE LIBERATING RESIN THEREON, SAID CURED RESIN BEING CAPABLE OF LIBERATING FORMALDEHYDE IN AMOUNTS IN EXCESS OF 0.3% BASED ON THE WEIGHT OF THE FABRIC WHEN STORED FOR 20 HOURS AT 100*F. AND AT 100% RELATIVE HUMIDITY, WHICH COMPRISES AFTER-TREATING SAID RESIN-TREATED FABRIC WITH AN AMOUNT OF A FORMALDEHYDE ACCEPTOR, SAID FORMALDEHYDE ACCEPTOR BEING A NITROGENOUS COMPOUND CAPABLE OF REACTING WITH FORMALDEHYDE TO FORM A CONDENSATION PRODUCT, SAID AMOUNT BEING SUFFICIENT TO REDUCE THE AMOUNT OF FORMALDEHYDE LIBERATED WHEN FABRIC SO TREATED IS STORED FOR 20 HOURS AT 100*F. AND 100% RELATIVE HUMIDITY TO 0.3% AND LESS BASED ON THE WEIGHT OF THE FABRIC, AND THEREAFTER DRYING THE FABRIC.
References Cited (Backward Citations)
GB312443A
Cited
US2267276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |