US2941900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing insulating walls
Assignee: Individual
•
Filing: 1955-08-17
•
Granted: 1960-06-21
•
Expires: 1975-08-17
Abstract
No abstract record available.
Inventors
- 👤 Schroder-Stranz Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:00
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/74; B29B7/7404; B29B7/7409; B29B7/7419; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; Y; Y10; Y10S; Y10S52/00; Y10S52/07; Y10S521/00; Y10S521/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
METHOD OF RENDERING OBJECTS HEAT AND SOUND INSULATING, COMPRISING PROPELLING A FOAM-FORMING SOLUTION CONTAINING A CATALYST FROM A FIRST STORAGE ZONE, AND A SOLUTION OF A UREA-FORMALDEHYDE PRECODENSATE ADAPTED TO HARDEN WHEN IN CONTACT WITH SAID CATALYST FROM A SECOND STORAGE ZONE INTO A COMMON FOAM-FROMING AND MIXING ZONE BY MEANS OF A GASEOUS PRESSURE MEDIUM, INTRODUCING SAID PRESSURE MEDIUM INTO SAID COMMON ZONE TO FORM FOAM AND TO CAUSE MIXING OF SAID FOAM WITH SAID PRECONDENSATE SOLUTION, AND SPRAYING THE MIXTURE PRODUCED WITH THE AID OF SAID PRESSURE MEDIUM UPON THE OBJECT TO BE TREATED, THE PRECONDENSATE SOLUTION BEING PROPELLED TO THE COMMON ZONE IMMEDIATELY PRIOR TO THE SPRAYING.
Claim 2
Dependent Claim
110 words
METHOD OF RENDERING OBJECTS HEAT AND SOUND INSULATING, COMPRISING PROPELLING A FOAM-FORMING SOLUTION CONTAINING A CATALYST FROM A FIRST STORAGE ZONE, AND A SOLUTION OF A UREA-FORMALDEHYDE PRECODENSATE ADAPTED TO HARDEN WHEN IN CONTACT WITH SAID CATALYST FROM A SECOND STORAGE ZONE INTO A COMMON FOAM-FROMING AND MIXING ZONE BY MEANS OF A GASEOUS PRESSURE MEDIUM, INTRODUCING SAID PRESSURE MEDIUM INTO SAID COMMON ZONE TO FORM FOAM AND TO CAUSE MIXING OF SAID FOAM WITH SAID PRECONDENSATE SOLUTION, AND SPRAYING THE MIXTURE PRODUCED WITH THE AID OF SAID PRESSURE MEDIUM UPON THE OBJECT TO BE TREATED, THE PRECONDENSATE SOLUTION BEING PROPELLED TO THE COMMON ZONE IMMEDIATELY PRIOR TO THE SPRAYING.
References Cited (Backward Citations)
US2158033A
Cited
US2178358A
Cited
US2432389A
Cited
US2602759A
Cited
GB652705A
Cited
US2629698A
Cited
US2608536A
Cited
US2653139A
Cited
US2695246A
Cited
US2747934A
Cited
US2715045A
Cited
US2705683A
Cited
US2823143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |