US2664408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urea and/or thiourea-aldehyde-sulfite waste liquor condensation product
Assignee: Pennsylvania Salt Manufacturing Co
•
Filing: 1950-02-11
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Granted: 1953-12-29
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Expires: 1970-02-11
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Plump
- 👤 James W Carroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:06
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/065; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/10; C08G12/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A NEW COMPOSITION OF MATTER COMPRISING THE CONDENSATION PRODUCT RESULTING FROM AN ACIDIFIED REACTION MIXTURE OF SULFITE PULP WASTE LIQUOR, WATER-SOLUBLE ALDEHYDE, UREA AND THIOUREA IN WHICH REACTION MIXTURE 0.1 TO 5 MOLES OF ALDEHYDE ARE PRESENT PER MOL OF COMBINED UREA AND THIOUREA AND SAID SULFITE PULP WASTE LIQUOR CONTAINS NO MORE THAN 1 GRAM OF SULFITE PULP WASTE LIQUOR SOLIDS PER GRAM OF COMBINED UREA AND THIOUREA.
Claim 2
Dependent Claim
69 words
A NEW COMPOSITION OF MATTER COMPRISING THE CONDENSATION PRODUCT RESULTING FROM AN ACIDIFIED REACTION MIXTURE OF SULFITE PULP WASTE LIQUOR, WATER-SOLUBLE ALDEHYDE, UREA AND THIOUREA IN WHICH REACTION MIXTURE 0.1 TO 5 MOLES OF ALDEHYDE ARE PRESENT PER MOL OF COMBINED UREA AND THIOUREA AND SAID SULFITE PULP WASTE LIQUOR CONTAINS NO MORE THAN 1 GRAM OF SULFITE PULP WASTE LIQUOR SOLIDS PER GRAM OF COMBINED UREA AND THIOUREA.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |