US3322019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasterboard screw
Assignee: RBS INDUSTRIES Inc A CORP OF
•
Filing: 1964-07-28
•
Granted: 1967-05-30
•
Expires: 1984-07-28
Abstract
No abstract record available.
Inventors
- 👤 Louis J Lovisek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:19
CPC Classifications
F; F16; F16B; F16B25/00; F16B25/001; F16B25/0031; F16B35/00; F16B35/04; F16B35/041; F16B35/048; F16B33/00; F16B33/02; F16B2033/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A SCREW FOR USE IN PLASTERBOARD, SAID SCREW HAVING A SHANK PROVIDED WITH A RIGHT-HAND THREAD, AND A HEAD AT A ONE END OF THE SHANK HAVING AN UNDERSIDE TAPERED TOWARD THE SHANK, SAID UNDERSIDE OF THE HEAD BEING PROVIDED WITH A LEFT-HAND SPIRAL THREAD.
Claim 2
Dependent Claim
45 words
A SCREW FOR USE IN PLASTERBOARD, SAID SCREW HAVING A SHANK PROVIDED WITH A RIGHT-HAND THREAD, AND A HEAD AT A ONE END OF THE SHANK HAVING AN UNDERSIDE TAPERED TOWARD THE SHANK, SAID UNDERSIDE OF THE HEAD BEING PROVIDED WITH A LEFT-HAND SPIRAL THREAD.
References Cited (Backward Citations)
CA513859A
Cited
US933865A
Cited
US1151861A
Cited
US1175665A
Cited
US2199809A
Cited
US2959086A
Cited
US3056234A
Cited
US3177755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |