US2563630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melamine-formaldehyde resinous compositions and process of producing same
Assignee: Wyeth Holdings LLC
•
Filing: 1946-06-07
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Granted: 1951-08-07
•
Expires: 1966-06-07
Abstract
No abstract record available.
Inventors
- 👤 Henry P Wohnsiedler
- 👤 Walter M Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:18
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/26; C08G12/30; C08G12/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
IN A PROCESS FOR MAKING A THERMOSETTING RESIN, THE STEP COMPRISING HEATING A SUBSTANTIALLY DRY MELAMINE-FORMALDEHYDE REACTION PRODUCT AT A PH OF 8-11, FOR A PERIOD OF TIME AND AT A TEMPERATURE VARYING BETWEEN ABOUT 1/2 HOUR AT 130* C., AND 24 HOURS AT 100* C., WHEREIN SAID REACTION PRODUCT COMPRISES MELAMINE AND FORMALDEHYDE IN A MOL RATIO OF 1:1-1:6, RESPECTIVELY, REACTED UNDER SLIGHTLY ALKALINE CONDITIONS AND DEHYDRATED AT A PH OF 8-11 TO REMOVE SUBSTANTIALLY ALL UNBOUND WATER.
Claim 2
Dependent Claim
79 words
IN A PROCESS FOR MAKING A THERMOSETTING RESIN, THE STEP COMPRISING HEATING A SUBSTANTIALLY DRY MELAMINE-FORMALDEHYDE REACTION PRODUCT AT A PH OF 8-11, FOR A PERIOD OF TIME AND AT A TEMPERATURE VARYING BETWEEN ABOUT 1/2 HOUR AT 130* C., AND 24 HOURS AT 100* C., WHEREIN SAID REACTION PRODUCT COMPRISES MELAMINE AND FORMALDEHYDE IN A MOL RATIO OF 1:1-1:6, RESPECTIVELY, REACTED UNDER SLIGHTLY ALKALINE CONDITIONS AND DEHYDRATED AT A PH OF 8-11 TO REMOVE SUBSTANTIALLY ALL UNBOUND WATER.
References Cited (Backward Citations)
US2197357A
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US2199803A
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US2327968A
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US2318560A
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US2409906A
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US2423428A
Cited
US2407599A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-06 | 1955-02-05 | 1955-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-06 | 1959-02-05 | 1959-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-06 | 1963-02-05 | 1963-08-07 | $7700.00 | Window Closed / Lapsed |