US3446356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste disposal system
Assignee: RICHARD D MAY
•
Filing: 1966-11-29
•
Granted: 1969-05-27
•
Expires: 1986-11-29
Abstract
No abstract record available.
Inventors
- 👤 Richard D May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:22
CPC Classifications
E; E03; E03D; E03D9/00; E03D9/10; E03D5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US442158A
Cited
US763606A
Cited
US2786025A
Cited
US2957487A
Cited
US2858939A
Cited
US3220553A
Cited
US3323650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |