Patent US3472390A successfully refreshed from Google Patents.
US3472390A
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Marine sewage disposal method and apparatus
Assignee: Pall Corp
•
Filing: 1967-09-20
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Granted: 1969-10-14
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Expires: 1987-09-20
Abstract
No abstract record available.
Inventors
- 👤 David B Pall
- 👤 David Rosenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:03
CPC Classifications
A; A61; A61L; A61L11/00; C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; C02F1/766; C02F2103/00; C02F2103/005; C02F2201/00; C02F2201/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2709680A
Cited
US2901114A
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US3044077A
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GB970667A
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US3170637A
Cited
US3275550A
Cited
US3361369A
Cited
US3323650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |