US2352832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preventing deposits within water formations and on well screens
Assignee: LAYNE NORTHERN Co Inc
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Filing: 1941-10-15
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Granted: 1944-07-04
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Expires: 1961-10-15
Abstract
No abstract record available.
Inventors
- 👤 Norris E Gunderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:03
CPC Classifications
E; E03; E03B; E03B3/00; E03B3/06; E03B3/08; E03B3/15; C; C09; C09K; C09K8/00; C09K8/52; C09K8/524; E03B5/00; E03B5/04; E21; E21B; E21B43/00; E21B43/02; E21B43/08
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) | 1947-07-04 | 1948-01-03 | 1948-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-07-04 | 1952-01-03 | 1952-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-07-04 | 1956-01-03 | 1956-07-04 | $7700.00 | Window Closed / Lapsed |