US2132837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage sludge digestion
Assignee: Dorr Co
•
Filing: 1936-02-08
•
Granted: 1938-10-11
•
Expires: 1956-02-08
Abstract
No abstract record available.
Inventors
- 👤 Henry J Talbot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:35
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0003; B01D21/0018; B01D21/009; B01D21/02; B01D21/04; B01D21/06; B01D21/24; B01D21/2405; B01D21/2427; B01D21/2433; B01D21/2438; B01D21/245; B01D21/0006; Y; Y10; Y10S; Y10S210/00; Y10S210/09
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) | 1941-10-10 | 1942-04-11 | 1942-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-10-10 | 1946-04-11 | 1946-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-10-10 | 1950-04-11 | 1950-10-11 | $7700.00 | Window Closed / Lapsed |