Patent US3998902A successfully refreshed from Google Patents.
US2132016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper making
Assignee: Paper Patents Co
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Filing: 1936-04-20
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Granted: 1938-10-04
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Expires: 1956-04-20
Abstract
No abstract record available.
Inventors
- 👤 Bois Horace A Du
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:15
CPC Classifications
D; D21; D21H; D21H23/00; D21H23/02; D21H23/22; D21H23/50; D21H21/00; D21H21/14; D21H21/34; D21H5/00; D21H5/0005; D21H5/0047
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) | 1941-10-03 | 1942-04-04 | 1942-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-10-03 | 1946-04-04 | 1946-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-10-03 | 1950-04-04 | 1950-10-04 | $7700.00 | Window Closed / Lapsed |