US2224868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical toilet
Assignee: Sears Roebuck and Co
•
Filing: 1938-03-31
•
Granted: 1940-12-17
•
Expires: 1958-03-31
Abstract
No abstract record available.
Inventors
- 👤 Marshall B Houck
- 👤 John R Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:30
CPC Classifications
E; E03; E03D; E03D5/00; E03D5/012; Y; Y02; Y02A; Y02A50/00; Y02A50/30; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87676; Y10T137/87917
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-12-17 | 1944-06-17 | 1944-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-17 | 1948-06-17 | 1948-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-17 | 1952-06-17 | 1952-12-17 | $7700.00 | Window Closed / Lapsed |