US3378027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical additive system
Assignee: Omco Chemical Corp
•
Filing: 1966-01-25
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Granted: 1968-04-16
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Expires: 1986-01-25
Abstract
No abstract record available.
Inventors
- 👤 Robert W Fredericks
- 👤 Theodore L Harbaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:52
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; Y; Y10; Y10T; Y10T137/00; Y10T137/4891
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2136372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |