US3309916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardness tester
Assignee: PAGE-WILSON Corp A CORP OF
•
Filing: 1963-11-18
•
Granted: 1967-03-21
•
Expires: 1983-11-18
Abstract
No abstract record available.
Inventors
- 👤 Carl F Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:28
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/40; G01N3/42
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
124 words
IN A HARDNESS TESTER, A FRAME INCLUDING A CYLINDER MEANS THEREIN; A WORK SUPPORT ADJUSTABLY SECURED TO SAID FRAME; A PLUNGER RECIPROCABLY MOUNTED IN SAID FRAME IN LINE WITH SAID WORK SUPPORT; SLEEVE MEANS SURROUNDING SAID PLUNGER; A BALL HELD BY SAID PLUNGER AT ITS END NEAREST SAID WORK SUPPORT; ARCUATE MEANS SECURED TO SAID SLEEVE MEANS AND SURROUNDING THE END OF SAID PLUNGER THAT SUPPORTS SAID BALL; ADJUSTABLE SCREW MEANS FOR PROVIDING RELATIVE MOVEMENT BETWEEN SAID WORK SUPPORT AND SAID SURROUNDING MEANS TO BRING THE TWO TOGETHER IN ABUTTING RELATION; A HOLLOW PISTON IN SAID CYLINDER; A PLUNGER MEANS WITHIN SAID PISTON; AN INDICATOR ON SAID FRAME; RECIPROCABLE MEANS INCLUDING YOKE AND FULCRUMED LEVER MEANS INTERCONNECTING SAID PISTON WITH SAID SLEEVE MEANS FOR
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) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |