US2553885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Septic tank construction
Assignee: HARRY H HENDON JR
•
Filing: 1949-04-06
•
Granted: 1951-05-22
•
Expires: 1969-04-06
Abstract
No abstract record available.
Inventors
- 👤 Howard A Van Orman
- 👤 Harry H Hendon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:22
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/28; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49904; Y10T29/49908; Y10T29/49915; Y10T403/00; Y10T403/47
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |