US3520626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color wheel for color comparators
Assignee: Hach Co
•
Filing: 1966-02-10
•
Granted: 1970-07-14
•
Expires: 1986-02-10
Abstract
No abstract record available.
Inventors
- 👤 Clifford C Hach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:38
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/68; B29C70/74; B29C70/745; B29C31/00; B29C31/04; B29C31/042; B29C31/047; B29C39/00; B29C39/02; B29C39/10; B29C39/12; G; G01; G01J; G01J3/00; G01J3/46; G01J3/52; G01J3/522; B29C43/00; B29C43/32; B29C43/58; B29C2043/5875; B29K; B29K2995/00; B29K2995/0018; B29K2995/002; B29K2995/0021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1878847A
Cited
US1805969A
Cited
US2172352A
Cited
FR1092544A
Cited
US2850941A
Cited
US2916968A
Cited
US3354025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |