Patent US1786459A successfully refreshed from Google Patents.
Patent US2676157A successfully refreshed from Google Patents.
US2676157A
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Process of forming foamed products from aldehyde modified alkyds and polyisocyanates
Assignee: RTX Corp
•
Filing: 1950-12-02
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Granted: 1954-04-20
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Expires: 1970-12-02
Abstract
No abstract record available.
Inventors
- 👤 Isaac L Newell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:10
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; Y; Y10; Y10S; Y10S220/00; Y10S220/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS OF FORMING A FOAMED RESIN WHICH COMPRISES TREATING ABOUT ONE TO ABOUT FOUR PARTS OF THE LIQUID REACTION PRODUCT FROM THE SIMULTANEOUS REACTION OF A MIXTURE CONSISTING OF ABOUT ONE MOLE OF A POLYCARBOXYLIC ACID, ABOUT ONE TO ABOUT TQO MOLS OF A POLYHYDRIC ALCOHOL AND ABOUT ONE-TENTH TO ABOUT THREE-QUARTERS OF A MOL OF AN ALDEHYDE, THE REACTION PRODUCT HAVING AN ACID NUMBER OF FROM 5 TO 75, BY MIXING WITH ONE PART OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORGANIC POLYSOCYANATES AND ORGAINC POLYISOTHIOCYANATES.
Claim 2
Dependent Claim
90 words
A PROCESS OF FORMING A FOAMED RESIN WHICH COMPRISES TREATING ABOUT ONE TO ABOUT FOUR PARTS OF THE LIQUID REACTION PRODUCT FROM THE SIMULTANEOUS REACTION OF A MIXTURE CONSISTING OF ABOUT ONE MOLE OF A POLYCARBOXYLIC ACID, ABOUT ONE TO ABOUT TQO MOLS OF A POLYHYDRIC ALCOHOL AND ABOUT ONE-TENTH TO ABOUT THREE-QUARTERS OF A MOL OF AN ALDEHYDE, THE REACTION PRODUCT HAVING AN ACID NUMBER OF FROM 5 TO 75, BY MIXING WITH ONE PART OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORGANIC POLYSOCYANATES AND ORGAINC POLYISOTHIOCYANATES.
References Cited (Backward Citations)
US1678105A
Cited
US1867584A
Cited
US2005499A
Cited
US2207626A
Cited
US2282827A
Cited
US2443736A
Cited
GB600618A
Cited
US2577279A
Cited
US2577280A
Cited
US2577281A
Cited
US2602783A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |