US2646415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of polythiols, phenols, and aldehydes
Assignee: Reconstruction Finance Corp
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Filing: 1948-02-11
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Granted: 1953-07-21
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Expires: 1968-02-11
Abstract
No abstract record available.
Inventors
- 👤 Joseph C Patrick
- 👤 Harry R Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:33
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/28; C08G16/00; C08G16/02; C08G16/0212; C08G16/0218; C08G16/0237; C08G8/04; C08G8/08; C08G8/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
71 words
THE RESINOUS REACTION PRODUCT OF PHENOL, FORMALDEHYDE AND A POLYTHIOL HAVING A MOLECULAR WEIGHT OF 1200 TO 1500 AND THE FORMULAD H(SCH2CH2OCH2OCH2CH2S)PH WHERE P INDICATES THE DEGREE OF POLYMERIZATION, SAID POLYTHIOL BEING USED IN THE PROPORTION OF ABOUT 5-70% BY WEIGHT OF THE SUM TOTAL OF THE PHENOL, FORMALDEHYDE AND POLYTHIOL, AND THE PHENOL AND FORMALDEHYDE BEING USED IN PROPERTIES, IN RELATION TO EACH OTHER, SUFFICIENT TO FORM A PHENOL-FORMALDEHYDE RESIN.
References Cited (Backward Citations)
US2035098A
Cited
GB420386A
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FR804552A
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FR48977E
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US2195380A
Cited
US2277941A
Cited
US2394375A
Cited
FR935415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |