Patent US3352960A successfully refreshed from Google Patents.
US3352960A
Expired / Lapsed
US
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Plastic tube bending method
Assignee: Andermac Inc
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Filing: 1965-08-18
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Granted: 1967-11-14
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Expires: 1985-08-18
Abstract
No abstract record available.
Inventors
- 👤 Jack E Mclaughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:22
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/0009; B29C53/00; B29C53/02; B29C53/08; B29C53/083; B29L; B29L2023/00; B29L2023/22; B29L2031/00; B29L2031/24; B29L2031/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
THE METHOD OF FORMING A BEND IN A TUBULAR PIECE OF CURED, THERMOPLASTIC MATERIAL OF A TYPE ADAPTED TO ABSORB MOISTURE OF VAPOR, THAT COMPRISES THE STEPS OF: (A) POSITIONING AND MAINTAINING SAID TUBULAR PIECE IN AIR HAVING A CONSTANT PREDETERMINED RELATIVE HUMIDITY AND A CONSTANT PREDETERMINED RELATIVE HUMIDITY AND A CONSTANT PREDETERMINED TEMPERATURE SUBSTANTIALLY BELOW THE HEAT DISTORTION TEMPERATURE OF SAID MATERIAL UNTIL SAID MATERIAL IS SATURATED BY ABORPTION TO A DEGREE THAT IS THE EQUIVALENT OF A MOISTURE CONTENT RELATIVE TO SAID MATERIAL OF SAID PIECE OF APPROXIMATELY 2% BY WEIGHT AT 80*F.; (B) THAN AND WHILE SAID PIECE HAS SAID MOISTURE CONTENT, HEATING SAID PIECE TO A TEMPERATURE ABOVE SAID HEAT DISTORTION TEMPERATURE AND BENDING SAID PIECE TO THE DESIRED FORM AT SAID TEMPERATURE THEREABOVE; AND (C) THEREAFTER, PERMITTING SAID PIECE TO COOL TO ATMOSPHERIC TEMPERATURE.
Claim 2
Independent Claim
139 words
THE METHOD OF FORMING A BEND IN A TUBULAR PIECE OF CURED, THERMOPLASTIC MATERIAL OF A TYPE ADAPTED TO ABSORB MOISTURE OF VAPOR, THAT COMPRISES THE STEPS OF: (A) POSITIONING AND MAINTAINING SAID TUBULAR PIECE IN AIR HAVING A CONSTANT PREDETERMINED RELATIVE HUMIDITY AND A CONSTANT PREDETERMINED RELATIVE HUMIDITY AND A CONSTANT PREDETERMINED TEMPERATURE SUBSTANTIALLY BELOW THE HEAT DISTORTION TEMPERATURE OF SAID MATERIAL UNTIL SAID MATERIAL IS SATURATED BY ABORPTION TO A DEGREE THAT IS THE EQUIVALENT OF A MOISTURE CONTENT RELATIVE TO SAID MATERIAL OF SAID PIECE OF APPROXIMATELY 2% BY WEIGHT AT 80*F.; (B) THAN AND WHILE SAID PIECE HAS SAID MOISTURE CONTENT, HEATING SAID PIECE TO A TEMPERATURE ABOVE SAID HEAT DISTORTION TEMPERATURE AND BENDING SAID PIECE TO THE DESIRED FORM AT SAID TEMPERATURE THEREABOVE; AND (C) THEREAFTER, PERMITTING SAID PIECE TO COOL TO ATMOSPHERIC TEMPERATURE.
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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |