US1831928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the elimination of foam in paper manufacture and the product thereof
Assignee: Raffold Process Corp
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Filing: 1927-06-29
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Granted: 1931-11-17
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Expires: 1947-06-29
Abstract
No abstract record available.
Inventors
- 👤 Harold R Rafton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:23
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/06; D21H21/12; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; D21H23/00; D21H23/76; D21H11/00; D21H11/02; D21H11/14; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28; D21H17/63; D21H17/66; D21H17/67; D21H17/675; D21H17/71; D21H21/14; D21H21/16; D21H21/28
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) | 1934-11-16 | 1935-05-18 | 1935-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-11-16 | 1939-05-18 | 1939-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-11-16 | 1943-05-18 | 1943-11-17 | $7700.00 | Window Closed / Lapsed |