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US1361940A
Expired / Lapsed
US
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Process of producing interactions between gas and a liquid
Assignee: Perry & Webster Inc
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Filing: 1919-11-20
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Granted: 1920-12-14
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Expires: 1939-11-20
Abstract
No abstract record available.
Inventors
- 👤 Paul W Webster
- 👤 Vern K Boynton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:22
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/231
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) | 1923-12-14 | 1924-06-14 | 1924-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-12-14 | 1928-06-14 | 1928-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-12-14 | 1932-06-14 | 1932-12-14 | $7700.00 | Window Closed / Lapsed |