Patent US3531983A successfully refreshed from Google Patents.
US3531983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sonic pole testing apparatus
Assignee: HEATH INTERN Inc
•
Filing: 1967-10-06
•
Granted: 1970-10-06
•
Expires: 1987-10-06
Abstract
No abstract record available.
Inventors
- 👤 Charles A Heath
- 👤 Jack Holland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:57
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/045; G01N2291/00; G01N2291/02; G01N2291/023; G01N2291/0238
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
SU156338A1
Cited
US2418284A
Cited
US2549076A
Cited
US2946217A
Cited
FR1297213A
Cited
US3292143A
Cited
US3361225A
Cited
US3345861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |