Patent US2849314A successfully refreshed from Google Patents.
US2849314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treatment and products from waste sulfite liquors
Assignee: Permanente Cement Co
•
Filing: 1953-03-02
•
Granted: 1958-08-26
•
Expires: 1973-03-02
Abstract
No abstract record available.
Inventors
- 👤 Worth C Goss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:38
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/48; D21H17/21; D21H17/23; D21J; D21J1/00; D21J1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
THE PROCESS OF PRODUCING REACTIVE NITROGEN CONTAINING COMPOSITIONS FROM WASTE SULFITE LIQUOR, WHICH ARE CONDENSABLE WITH ALDEHYDES TO FORM POTENTIALLY THERMOSETTING RESINS, COMPRISING HEATING THE LIQUOR IN THE PRESENCE OF AMMONIA TO IMPART A SUBSTANTIAL NITROGEN CONTENT TO THE ACID-PRECIPITATABLE COMPONENT THEREOF, AND ACIDIFYING THE LIQUOR TO PRECIPITATE AND RECOVER SAID NITROGEN-CONTAINING COMPOSITIONS.
Claim 2
Dependent Claim
53 words
THE PROCESS OF PRODUCING REACTIVE NITROGEN CONTAINING COMPOSITIONS FROM WASTE SULFITE LIQUOR, WHICH ARE CONDENSABLE WITH ALDEHYDES TO FORM POTENTIALLY THERMOSETTING RESINS, COMPRISING HEATING THE LIQUOR IN THE PRESENCE OF AMMONIA TO IMPART A SUBSTANTIAL NITROGEN CONTENT TO THE ACID-PRECIPITATABLE COMPONENT THEREOF, AND ACIDIFYING THE LIQUOR TO PRECIPITATE AND RECOVER SAID NITROGEN-CONTAINING COMPOSITIONS.
References Cited (Backward Citations)
US478229A
Cited
US757337A
Cited
US1160362A
Cited
GB202016A
Cited
US1899526A
Cited
US2159411A
Cited
US2184622A
Cited
US2191737A
Cited
US2266265A
Cited
US2205355A
Cited
US2228567A
Cited
US2338602A
Cited
US2286643A
Cited
US2365599A
Cited
US2491832A
Cited
FR982100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |