US2943967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced plastic screw threads
Assignee: 3M Co
•
Filing: 1956-06-29
•
Granted: 1960-07-05
•
Expires: 1976-06-29
Abstract
No abstract record available.
Inventors
- 👤 John G Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:05
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/16; B; B29; B29D; B29D1/00; B29D1/005; B29K; B29K2105/00; B29K2105/06; B29L; B29L2001/00; Y; Y10; Y10S; Y10S411/00; Y10S411/904; Y10S411/908; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1039; Y10T156/1041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE METHOD OF FABRICATING REINFORCED PLASTIC MALE SCREW THREADS FOR A PLASTIC PIPE MEMBER FROM FLAT COMPACT LAYERS OF CONTINUOUS NON-WOVEN LINEALLY-ALIGNED FILAMENTS FILED WITH PLASTIC MATERIAL AND SUSING AN INTERNAILY THREADED SPLIT DIE, CONSISTING ESSENTIALLY OF THE STEPS OF LAYING AT LEAST TWO OF SAID PLASTIC-FILLED FILAMENTS OF EACH LAYER DISPOSED AT SUBSTANTIAL ANGLES TO THE FILAMENTS OF AN ADJACENT LAYER, ACROSS THE SURFACE OF EACH PORTION OF SAID SPLIT DIE, FORCING THE PLASTIC-FILLED LAYERS INTO THE PROFILE OF THE DIE THREADS PROGRESSIVELY FROM ONE END OF EACH DIE SECTION TO THE OTHER UNDER A PRESSURE SUFFICIENT TO CAUSE THE PLASTIC-FILLED LAYER TO FLOW, ADHERING THE EXPOSED SURFACES OF THE PLASTIC-FILLED LAYERS TO SAID PLASTIC PIPE MEMBER, HARDENING THE PLASTIC, AND REMOVING THE DIE.
Claim 2
Independent Claim
125 words
THE METHOD OF FABRICATING REINFORCED PLASTIC MALE SCREW THREADS FOR A PLASTIC PIPE MEMBER FROM FLAT COMPACT LAYERS OF CONTINUOUS NON-WOVEN LINEALLY-ALIGNED FILAMENTS FILED WITH PLASTIC MATERIAL AND SUSING AN INTERNAILY THREADED SPLIT DIE, CONSISTING ESSENTIALLY OF THE STEPS OF LAYING AT LEAST TWO OF SAID PLASTIC-FILLED FILAMENTS OF EACH LAYER DISPOSED AT SUBSTANTIAL ANGLES TO THE FILAMENTS OF AN ADJACENT LAYER, ACROSS THE SURFACE OF EACH PORTION OF SAID SPLIT DIE, FORCING THE PLASTIC-FILLED LAYERS INTO THE PROFILE OF THE DIE THREADS PROGRESSIVELY FROM ONE END OF EACH DIE SECTION TO THE OTHER UNDER A PRESSURE SUFFICIENT TO CAUSE THE PLASTIC-FILLED LAYER TO FLOW, ADHERING THE EXPOSED SURFACES OF THE PLASTIC-FILLED LAYERS TO SAID PLASTIC PIPE MEMBER, HARDENING THE PLASTIC, AND REMOVING THE DIE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |