USD312421S
Expired / Lapsed
US
⏱️ 0.0 years remaining
pH meter
Assignee: Hach Co
•
Filing: 1987-09-04
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Granted: 1990-11-27
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Expires: 2007-09-04
Abstract
No abstract record available.
Inventors
- 👤 Jerry B. Trottmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:43
CPC Classifications
—
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
9 words
The ornamental design for a pH meter, as shown.
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) | 1993-11-26 | 1994-05-28 | 1994-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-26 | 1998-05-28 | 1998-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-26 | 2002-05-28 | 2002-11-27 | $7700.00 | Window Closed / Lapsed |