US3155753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of filling a rigid hollow structure with foamed-in-place plastic foam
Assignee: WR Grace and Co
•
Filing: 1963-02-04
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Granted: 1964-11-03
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Expires: 1983-02-04
Abstract
No abstract record available.
Inventors
- 👤 Stanley N Weissman
- 👤 George L Matthias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:18
CPC Classifications
B; B32; B32B; B32B27/00; Y; Y10; Y10S; Y10S273/00; Y10S273/04; Y10S273/06; Y10S273/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
IN THE PROCESS OF FILLING A RIGID HOLLOW PLASTIC SHAPED STRUCTURE WITH A FOAMED-IN-PLACE PLASTIC FOAM, THE IMPROVEMENT WHICH COMPRISES MELTING THE INTERIOR SURFACE OF SAID RIGID HOLLOW PLASTIC SHPAED STRUCTURE AND THEN FOAMING A MOLTEN PLASTIC WITHIN THE HOLLOW STRUCTURE WHILE THE INTERIOR SURFACE IS IN A SOFTENED CONDITION.
Claim 2
Dependent Claim
50 words
IN THE PROCESS OF FILLING A RIGID HOLLOW PLASTIC SHAPED STRUCTURE WITH A FOAMED-IN-PLACE PLASTIC FOAM, THE IMPROVEMENT WHICH COMPRISES MELTING THE INTERIOR SURFACE OF SAID RIGID HOLLOW PLASTIC SHPAED STRUCTURE AND THEN FOAMING A MOLTEN PLASTIC WITHIN THE HOLLOW STRUCTURE WHILE THE INTERIOR SURFACE IS IN A SOFTENED CONDITION.
References Cited (Backward Citations)
CA641073A
Cited
US2977639A
Cited
US2962407A
Cited
US2976577A
Cited
US3015132A
Cited
US2983962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |