US3474467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sanitary holding tank system
Assignee: Individual
•
Filing: 1967-04-10
•
Granted: 1969-10-28
•
Expires: 1987-04-10
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Stinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:47
CPC Classifications
B; B63; B63B; B63B29/00; B63B29/16; E; E03; E03F; E03F1/00; E03F1/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US964217A
Cited
US1859632A
Cited
GB530781A
Cited
US2671573A
Cited
US2798228A
Cited
US2868368A
Cited
US2865028A
Cited
US2806622A
Cited
US3040333A
Cited
US3318248A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |