US3555135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stress relieving of molded plastic structures
Assignee: Phillips Petroleum Co
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Filing: 1968-02-29
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Granted: 1971-01-12
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Expires: 1988-02-29
Abstract
Abstract MOLDED PLASTIC STRUCTURES COMPRISED OF TWO OR MORE INTERSECTING GENERALLY RECTILINEAR SIDES OR SURFACES ARE RELIEVED OF STRESSES DEVELOPED IN THE STRUCTURE DURING THE MANUFACTURE THEREOF BY APPLYING HEAT TO AT LEAST ONE CORNER OF SAID STRUCTURE. D R A W I N G
Inventors
- 👤 William Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:19
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/02; B29C2071/022; B29K; B29K2001/00; B29K2001/08; B29K2001/12; B29K2023/00; B29K2995/00; B29K2995/0037; B29K2995/0041
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |