US3449081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test kit
Assignee: Electronic Instrument Co
•
Filing: 1965-03-29
•
Granted: 1969-06-10
•
Expires: 1985-03-29
Abstract
No abstract record available.
Inventors
- 👤 Leonard A Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:31
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5082; B01L1/00; B01L1/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1910236A
Cited
US1986403A
Cited
US2530909A
Cited
US2660342A
Cited
US2761833A
Cited
US2781312A
Cited
US3206789A
Cited
US3189223A
Cited
US3248017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |