US3149017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene balloon
Assignee: WR Grace and Co
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Filing: 1961-05-24
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Granted: 1964-09-15
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Expires: 1981-05-24
Abstract
No abstract record available.
Inventors
- 👤 John E Ehrreich
- 👤 Charles P Fazio
- 👤 Beverly A Nickerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:35
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/04; B29C49/00; B29C49/0005; B29C49/0006; B29C49/0042; B29C49/02; B29C49/06905; B29C49/0691; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2105/00; B29K2105/24; B29K2623/00; B29K2623/04; B29K2623/06; B29K2995/00; B29K2995/0037; B29K2995/005; B29K2995/0053; B29L; B29L2022/00; B29L2022/02; B29L2022/022; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
A METHOD OF MANUFACTURING A CONSTANT PRESSURE ALTITUDE METEOROLOGICAL BALLOON OF POLYETHYLENE FILM, COMPRISING THE STEPS OF: FORMING A LAY-FLAT PREFORM BY PLACING TWO SHEETS OF POLYETHYLENE IN THE RANGE OF 5 TO 40 MILS THICK EACH TOGETHER AND FORMING A HEAT AND PRESSURE SEALED EDGE SEAM THEREIN HAVING A GENERALLY CIRCULAR CONFIGURATION WITH A NECKED OPENING, SAID POLYETHYLENE HAVING A DENSITY IN THE RANGE OF 0.91 TO 0.96, A TENSILE AT 25*C. OF AT LEAST 500 POUNDS PER SQUARE INCH, AND A FIRST ORDER TRANSITION TEMPERATURE ABOVE 103*C.; IRRADIATING SAID PREFORM WITHIN THE RANGE OF 8 TO 16 MEGARADS OF HIGH ENERGY IONIZING RADIATION; HEATING THE IRRADIATED PREFORM TO A WORKING TEMPERATURE IN THE RANGE OF 1 TO 35*C. ABOVE SAID TRANSITION TEMPERATURE; BLOWING SAID PREFORM BY THE APPLICATION OF INTERNAL FLUID PRESSURE TO THE EXTENT OF AT LEAST 100 PERCENT FILM ELONGATION (AREA INCREASE) AND A FINAL FILM THICKNESS UNDER 5 MILS WHILE MAINTAINING SAID EDGE SEAM AT SAID WORKING TEMPERATURE AND COOLING THE BLOWN SHAPE TO BELOW SAID TRANSITION TEMPERATURE WHILE MAINTAINING INTERNAL FLUID PRESSURE.
Claim 2
Independent Claim
178 words
A METHOD OF MANUFACTURING A CONSTANT PRESSURE ALTITUDE METEOROLOGICAL BALLOON OF POLYETHYLENE FILM, COMPRISING THE STEPS OF: FORMING A LAY-FLAT PREFORM BY PLACING TWO SHEETS OF POLYETHYLENE IN THE RANGE OF 5 TO 40 MILS THICK EACH TOGETHER AND FORMING A HEAT AND PRESSURE SEALED EDGE SEAM THEREIN HAVING A GENERALLY CIRCULAR CONFIGURATION WITH A NECKED OPENING, SAID POLYETHYLENE HAVING A DENSITY IN THE RANGE OF 0.91 TO 0.96, A TENSILE AT 25*C. OF AT LEAST 500 POUNDS PER SQUARE INCH, AND A FIRST ORDER TRANSITION TEMPERATURE ABOVE 103*C.; IRRADIATING SAID PREFORM WITHIN THE RANGE OF 8 TO 16 MEGARADS OF HIGH ENERGY IONIZING RADIATION; HEATING THE IRRADIATED PREFORM TO A WORKING TEMPERATURE IN THE RANGE OF 1 TO 35*C. ABOVE SAID TRANSITION TEMPERATURE; BLOWING SAID PREFORM BY THE APPLICATION OF INTERNAL FLUID PRESSURE TO THE EXTENT OF AT LEAST 100 PERCENT FILM ELONGATION (AREA INCREASE) AND A FINAL FILM THICKNESS UNDER 5 MILS WHILE MAINTAINING SAID EDGE SEAM AT SAID WORKING TEMPERATURE AND COOLING THE BLOWN SHAPE TO BELOW SAID TRANSITION TEMPERATURE WHILE MAINTAINING INTERNAL FLUID PRESSURE.
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |