Patent US4923038A successfully refreshed from Google Patents.
Patent US3258512A successfully refreshed from Google Patents.
US3258512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying a rigid unicellular polyurethane foam coating to pipe fittings
Assignee: Individual
•
Filing: 1965-01-19
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Granted: 1966-06-28
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Expires: 1985-01-19
Abstract
No abstract record available.
Inventors
- 👤 Archibald T Flower
- 👤 Ganser Paul
- 👤 David L Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:55
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/18; B29C44/187; B29C44/1228; B29C44/1242; B29C70/00; B29C70/68; B29C70/74; F; F16; F16L; F16L58/00; F16L58/18; B29K; B29K2075/00; B29K2105/00; B29K2105/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
THE METHOD OF APPLYING A RIGID UNICELLULAR POLYURETHANE FOAM COATING ON AN UNCOATED PORTION OF A PIPE LINE WHICH COMPRISES ASSEMBLING ABOUT THE UNCOATED PORTION OF THE PIPE LINE IN SPACED RELATION THERETO, A PREFORMED SEMI-RIGID PLASTIC MOLD DIVIDED LONGITUDINALLY TO FORM SECTIONS HAVING OPPOSED PERIMETRICAL FINS ALONG THEIR EDGES SECURED TOGETHER, AT SPACED INTERVALS, TO PERMIT EXPANSION OF SAID FINS UNDER PRESSURE, SAID MOLD HAVING A FILL OPENING IN THE TOP THEREOF, POURING INTO THE FILL OPENING OF THE MOLD A QUANTITY OF LIQUID FOAMED INPLACE POLYOLISOCYANATE RESIN SYSTEM SO THAT IT COLLECTS IN THE BOTTOM OF THE MOLD AND THERE REACTS TO GENERATE THE POLYURETHANE FOAM TO FILL THE MOLD SPACE WITH THE SURPLUS FOAM BEING EXTRUDED FROM THE FILL OPENING AND BETWEEN THE FINS OF THE MOLD SECTIONS.
Claim 2
Independent Claim
131 words
THE METHOD OF APPLYING A RIGID UNICELLULAR POLYURETHANE FOAM COATING ON AN UNCOATED PORTION OF A PIPE LINE WHICH COMPRISES ASSEMBLING ABOUT THE UNCOATED PORTION OF THE PIPE LINE IN SPACED RELATION THERETO, A PREFORMED SEMI-RIGID PLASTIC MOLD DIVIDED LONGITUDINALLY TO FORM SECTIONS HAVING OPPOSED PERIMETRICAL FINS ALONG THEIR EDGES SECURED TOGETHER, AT SPACED INTERVALS, TO PERMIT EXPANSION OF SAID FINS UNDER PRESSURE, SAID MOLD HAVING A FILL OPENING IN THE TOP THEREOF, POURING INTO THE FILL OPENING OF THE MOLD A QUANTITY OF LIQUID FOAMED INPLACE POLYOLISOCYANATE RESIN SYSTEM SO THAT IT COLLECTS IN THE BOTTOM OF THE MOLD AND THERE REACTS TO GENERATE THE POLYURETHANE FOAM TO FILL THE MOLD SPACE WITH THE SURPLUS FOAM BEING EXTRUDED FROM THE FILL OPENING AND BETWEEN THE FINS OF THE MOLD SECTIONS.
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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |