US3025962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective devices for septic tanks
Assignee: SANITARY PLASTICS Inc
•
Filing: 1958-09-02
•
Granted: 1962-03-20
•
Expires: 1978-09-02
Abstract
No abstract record available.
Inventors
- 👤 Frederick P Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:59
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28; C02F3/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1958252A
Cited
US1984777A
Cited
US2299529A
Cited
US2147422A
Cited
US2245124A
Cited
US2279813A
Cited
US2365221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-19 | 1965-09-18 | 1966-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-19 | 1969-09-18 | 1970-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-19 | 1973-09-18 | 1974-03-20 | $7700.00 | Window Closed / Lapsed |