Patent US2577279A successfully refreshed from Google Patents.
US2577279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamed alkyd-isocyanate plastics
Assignee: Lockheed Martin Corp
•
Filing: 1948-06-25
•
Granted: 1951-12-04
•
Expires: 1968-06-25
Abstract
No abstract record available.
Inventors
- 👤 Simon Eli
- 👤 Frank W Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:32
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7614; C08G18/7621; C08J; C08J9/00; C08J9/02; Y; Y10; Y10S; Y10S220/00; Y10S220/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
THE METHOD OF MAKING CELLULAR PLASTIC MATERIAL WHICH COMPRISES PROVIDING AN ALKYD RESIN HAVING A WATER CONTENT OF NOT MORE THAN 1.5% BY WEIGHT, NAMELY THE REACTION PRODUCT OF GLYCEROL, ADIPIC ACID AND PHTHALIC ANHYDRIDE, ADDING A SUFFICIENT QUANTITY OF A METALLIC SALT HYDRATE THAT IS SOLUBLE IN ANHYDROUS ETHYL ALCOHOL AT APPROXIMATELY 18* C. TO THE EXTENT OF AT LEAST 1 1/2 GRAMS OF THE SALT TO 100 C. C. OF THE ETHYL ALCOHOL TO THE RESIN TO INCREASE THE WATER CONTENT BY FROM 0.1 TO 5.0 GRAMS OF WATER FOR EACH 100 GRAMS OF THE RESIN, MIXING META TOLUENE DI-ISOCYANATE AND THE RESIN-SALT HYDRATE MIXTURE IN THE PROPORTION OF FROM APPROXIMATELY 35 TO APPROXIMATELY 150 PARTS BY WEIGHT OF THE META TOLUENE DI-ISOCYANATE TO 100 PARTS BY WEIGHT OF THE RESIN, AND ALLOWING THE RESULTANT MIXTURE TO REACT.
Claim 2
Independent Claim
140 words
THE METHOD OF MAKING CELLULAR PLASTIC MATERIAL WHICH COMPRISES PROVIDING AN ALKYD RESIN HAVING A WATER CONTENT OF NOT MORE THAN 1.5% BY WEIGHT, NAMELY THE REACTION PRODUCT OF GLYCEROL, ADIPIC ACID AND PHTHALIC ANHYDRIDE, ADDING A SUFFICIENT QUANTITY OF A METALLIC SALT HYDRATE THAT IS SOLUBLE IN ANHYDROUS ETHYL ALCOHOL AT APPROXIMATELY 18* C. TO THE EXTENT OF AT LEAST 1 1/2 GRAMS OF THE SALT TO 100 C. C. OF THE ETHYL ALCOHOL TO THE RESIN TO INCREASE THE WATER CONTENT BY FROM 0.1 TO 5.0 GRAMS OF WATER FOR EACH 100 GRAMS OF THE RESIN, MIXING META TOLUENE DI-ISOCYANATE AND THE RESIN-SALT HYDRATE MIXTURE IN THE PROPORTION OF FROM APPROXIMATELY 35 TO APPROXIMATELY 150 PARTS BY WEIGHT OF THE META TOLUENE DI-ISOCYANATE TO 100 PARTS BY WEIGHT OF THE RESIN, AND ALLOWING THE RESULTANT MIXTURE TO REACT.
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) | 1954-12-03 | 1955-06-04 | 1955-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-03 | 1959-06-04 | 1959-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-03 | 1963-06-04 | 1963-12-04 | $7700.00 | Window Closed / Lapsed |