US2815510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sanitary unit
Assignee: Individual
•
Filing: 1955-04-19
•
Granted: 1957-12-10
•
Expires: 1975-04-19
Abstract
No abstract record available.
Inventors
- 👤 Mayne Norman Langhorne
- 👤 Mayne Gordon Colburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:30
CPC Classifications
E; E03; E03D; E03D5/00; E03D5/012; E03D11/00; E03D11/02; E03D11/10; E03D5/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1303358A
Cited
US907768A
Cited
US1158992A
Cited
US1996325A
Cited
US2078415A
Cited
US2431263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |