Patent US4401368A successfully refreshed from Google Patents.
Patent US4488934A successfully refreshed from Google Patents.
Patent US3426435A successfully refreshed from Google Patents.
US3426435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct reading tape rule
Assignee: HK Porter Co Inc
•
Filing: 1966-06-17
•
Granted: 1969-02-11
•
Expires: 1986-06-17
Abstract
No abstract record available.
Inventors
- 👤 Robert L Ballard
- 👤 James E Edgell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:25
CPC Classifications
G; G01; G01B; G01B3/00; G01B3/10; G01B3/1041; G01B3/1043; G01B3/1046; G01B3/1005; G01B3/1007; G01B2003/1017; G01B3/1061; G01B2003/1064; G01B3/1003
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |