US2692865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified phenolic resin
Assignee: Catalin Corp of America
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Filing: 1951-06-26
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Granted: 1954-10-26
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Expires: 1971-06-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas G Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:41
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/28; C08G14/00; C08G14/02; C08G14/04; C08G8/04; C08G8/06; C08G8/08; C08G8/10; C08G8/12; C08G8/20; C08G8/24; C08G8/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
IN MAKING A RESINOUS COMPOSITION, THE METHOD WHICH COMPRISES MAINTAINING PHENOL IN CONTACT WITH FORMALDEHYDE, IN THE PROPORTION OF APPROXIMATELY 0.8 TO 2.5 MOLS FOR 1 MOL OF THE PHENOL, ALKALI AND WATER, UNTIL CONDENSATION OCCURS TO GIVE A WATER SOLUBLE CONDENSATION PRODUCT AND UNTIL THE CONTANT OF FREE FORMALDEHYDE CEASES TO FALL RAPIDLY; THEN INTRODUCING INTO THE RESULTING WATER SOLUBLE CONDENSATION PRODUCT A LACTONE SELECTED FROM THE GROUP CONSISTING OF BETA-PROPIOLACTONE, BETA-BUTYROLACTONE, AND BETA-ISOBUTYROLACTONE, IN THE PROPORTION OF 0.1 TO 1 MOL OF THE LACTONE FOR 1 MOL OF THE PHENOL USED, AND A WATER SOLUBLE ALKALI IN AMOUN TIF ANY REQUIRED TO ''ESTABLISH THE PH OF THE RESULTING MIXTURE AT A LEVEL AT LEAST AS HIGH AS 4; INTRODUCING THE SAID ALKALI IN ADDITIONAL AMOUNT IF ANY REQUIRED FROM TIME TO TIME TO MAINTAIN THE PH AT THE SAID LEVEL; AND CONTINUING THE CONTACT OF THE SAID CONDENSATION PRODUCT, LACTONE AND ALKALI UNTIL REACTION IN THE MIXTURE PRACTICALLY CEASES.
Claim 2
Dependent Claim
161 words
IN MAKING A RESINOUS COMPOSITION, THE METHOD WHICH COMPRISES MAINTAINING PHENOL IN CONTACT WITH FORMALDEHYDE, IN THE PROPORTION OF APPROXIMATELY 0.8 TO 2.5 MOLS FOR 1 MOL OF THE PHENOL, ALKALI AND WATER, UNTIL CONDENSATION OCCURS TO GIVE A WATER SOLUBLE CONDENSATION PRODUCT AND UNTIL THE CONTANT OF FREE FORMALDEHYDE CEASES TO FALL RAPIDLY; THEN INTRODUCING INTO THE RESULTING WATER SOLUBLE CONDENSATION PRODUCT A LACTONE SELECTED FROM THE GROUP CONSISTING OF BETA-PROPIOLACTONE, BETA-BUTYROLACTONE, AND BETA-ISOBUTYROLACTONE, IN THE PROPORTION OF 0.1 TO 1 MOL OF THE LACTONE FOR 1 MOL OF THE PHENOL USED, AND A WATER SOLUBLE ALKALI IN AMOUN TIF ANY REQUIRED TO ''ESTABLISH THE PH OF THE RESULTING MIXTURE AT A LEVEL AT LEAST AS HIGH AS 4; INTRODUCING THE SAID ALKALI IN ADDITIONAL AMOUNT IF ANY REQUIRED FROM TIME TO TIME TO MAINTAIN THE PH AT THE SAID LEVEL; AND CONTINUING THE CONTACT OF THE SAID CONDENSATION PRODUCT, LACTONE AND ALKALI UNTIL REACTION IN THE MIXTURE PRACTICALLY CEASES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-25 | 1958-04-26 | 1958-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-25 | 1962-04-26 | 1962-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-25 | 1966-04-26 | 1966-10-26 | $7700.00 | Window Closed / Lapsed |