US3575871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetraaryl arylaminium salts and use as infrared absorbers
Assignee: Wyeth Holdings LLC
•
Filing: 1967-02-23
•
Granted: 1971-04-20
•
Expires: 1987-02-23
Abstract
Abstract A DEFINED CLASS OF DIARYL-(N,N-DIARYLAMINOARYL)AMINIUM SALTS USEFUL AS INFRARED ABSORBERS IS DISCLOSED; ESPECIALLY THE BIS(P-DIALKYLAMINOPHENYL)(N,N-BIS(P-DIALKYLAMINOPHENYL)-P -AMINOPHENYL)AMINIUM SALTS, SUCH AS BIS(P-DIETHLAMINOPHENYL)(N,N-BIS(P-DIETHYLAMINOPHENYL)-P-AMINOPHENYL)AMINIUM HEXAFLUOROANTIMONATE. THE AMINIUM SALTS ARE OBTAINED BY OXIDATION OF N,N,N'', N'',TETRAARYLARYLENEDIAMINES WITH SILVER SALTS.
Inventors
- 👤 Peter Vincent Susi
- 👤 Norma Ann Weston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:32
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/46; B41M5/465; B01; B01J; B01J13/00; B01J13/02; B01J13/025; B41M7/00; B41M7/02; C; C07; C07F; C07F9/00; C07F9/66; C07F9/68; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; C08K5/19; C09; C09B; C09B67/00; C09B67/0071; C09C; C09C3/00; C09C3/08; D; D06; D06P; D06P1/00; D06P1/44; D06P1/655; G; G02; G02B; G02B23/00; G02B23/12; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2989
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |