Patent US2928446A successfully refreshed from Google Patents.
US2928446A
Expired / Lapsed
US
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Self-locking screw-threaded fastening member
Assignee: Arthur D Little Inc
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Filing: 1957-04-05
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Granted: 1960-03-15
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Expires: 1977-04-05
Abstract
No abstract record available.
Inventors
- 👤 Raymond E James
- 👤 Richard W Merrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:54
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/30; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/947; Y10T; Y10T428/00; Y10T428/24; Y10T428/24033; Y10T428/24041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A SCREW-THREADED FASTENING MEMBER HAVING A COATING OF A COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF 100 PARTS OF A TRIPOLYMER CONSTITUTED OF ABOUT 85-90 PARTS VINYL CHLORIDE, 10-15 PARTS VINYL ACETATE, AND 1/2-2 PARTS MALEIC ACID, AND 5 TO 35 PARTS OF A LIQUID EPOXY RESIN OF MOLECULAR WEIGHT ABOUT 200 TO 500, ALL PARTS BEING BY WEIGHT, SAID COATING BEING CONFINED TO THE THREADED PORTION OF SAID SCREW-THREADED FASTENING MEMBER.
Claim 2
Dependent Claim
72 words
A SCREW-THREADED FASTENING MEMBER HAVING A COATING OF A COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF 100 PARTS OF A TRIPOLYMER CONSTITUTED OF ABOUT 85-90 PARTS VINYL CHLORIDE, 10-15 PARTS VINYL ACETATE, AND 1/2-2 PARTS MALEIC ACID, AND 5 TO 35 PARTS OF A LIQUID EPOXY RESIN OF MOLECULAR WEIGHT ABOUT 200 TO 500, ALL PARTS BEING BY WEIGHT, SAID COATING BEING CONFINED TO THE THREADED PORTION OF SAID SCREW-THREADED FASTENING MEMBER.
References Cited (Backward Citations)
US2321414A
Cited
US2795565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |