US2832080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated valve and drain unit
Assignee: Individual
•
Filing: 1956-03-28
•
Granted: 1958-04-29
•
Expires: 1976-03-28
Abstract
No abstract record available.
Inventors
- 👤 Warren S Hertenstein
- 👤 William E Blessing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:08
CPC Classifications
D; D06; D06F; D06F39/00; D06F39/08; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/2937; Y10T137/2947; Y10T137/295; Y10T137/6851; Y10T137/6966; Y10T137/6969; Y10T137/698
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1317829A
Cited
US1354680A
Cited
US1602556A
Cited
US1705768A
Cited
CH172299A
Cited
US2658232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-28 | 1961-10-28 | 1962-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-28 | 1965-10-28 | 1966-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-28 | 1969-10-28 | 1970-04-29 | $7700.00 | Window Closed / Lapsed |