US3965793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particleboard screw
Assignee: GALT CRAFTED PRODUCTS Inc 4500 KISHWAUKEE STR ROCKLAND IL 61109 A DE CORP
•
Filing: 1973-10-18
•
Granted: 1976-06-29
•
Expires: 1993-10-18
Abstract
Abstract A screw fastener for use in particleboard or similar material having a screw thread formed with an included angle of 48 DEG , a constant depth thread and a gimlet type point.
Inventors
- 👤 Kenneth L. Roser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:40
CPC Classifications
F; F16; F16B; F16B25/00; F16B25/0036; F16B25/0042; F16B25/0047; F16B25/001; F16B25/0015; F16B25/0084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A threaded fastener formed by roll thread methods for use in particleboard and similar materials comprising a cylindrical shank having a driving head at one end and a gimlet-type point at the opposite end, said point having an included angle of about 40° and a helical thread on the shank and point of constant depth except where the thread merges into the shank adjacent the head, said thread having a generally sharp crest with an included angle of approximately 48° and a substantially cylindrical and relatively wide root between each thread turn with the ratio of root diameter to pitch being substantially in the range of 1.2 to 1.6 and varying substantially uniformly and inversely as the ratio of the major diameter to the root diameter varies in the range of 1.5 to 1.7, said thread having a constant depth on the point with a decreasing major diameter and a thread crest with an approximately 48° included angle.
Claim 2
Dependent Claim
158 words
A threaded fastener formed by roll thread methods for use in particleboard and similar materials comprising a cylindrical shank having a driving head at one end and a gimlet-type point at the opposite end, said point having an included angle of about 40° and a helical thread on the shank and point of constant depth except where the thread merges into the shank adjacent the head, said thread having a generally sharp crest with an included angle of approximately 48° and a substantially cylindrical and relatively wide root between each thread turn with the ratio of root diameter to pitch being substantially in the range of 1.2 to 1.6 and varying substantially uniformly and inversely as the ratio of the major diameter to the root diameter varies in the range of 1.5 to 1.7, said thread having a constant depth on the point with a decreasing major diameter and a thread crest with an approximately 48° included angle.
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) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |