US3398831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter structure
Assignee: Individual
•
Filing: 1966-01-20
•
Granted: 1968-08-27
•
Expires: 1986-01-20
Abstract
No abstract record available.
Inventors
- 👤 Adrian L Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:43
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/688
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US624580A
Cited
US894679A
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US1202356A
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US1273608A
Cited
US2178240A
Cited
US2258063A
Cited
US2593228A
Cited
US2602697A
Cited
US2885271A
Cited
US2911902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |