US3516543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water conditioning device
Assignee: Mattel Aquarium Inc
•
Filing: 1967-05-23
•
Granted: 1970-06-23
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Expires: 1987-05-23
Abstract
No abstract record available.
Inventors
- 👤 Allan H Willinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:21
CPC Classifications
F; F04; F04B; F04B45/00; F04B45/02; F04B45/027; A; A01; A01K; A01K63/00; A01K63/04; A01K63/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3273717A
Cited
US2552261A
Cited
US3080495A
Cited
GB924932A
Cited
US3321081A
Cited
US3371789A
Cited
US3392836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |