US2215244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making pressed board products
Assignee: United States Gypsum Co
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Filing: 1935-07-03
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Granted: 1940-09-17
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Expires: 1955-07-03
Abstract
No abstract record available.
Inventors
- 👤 Harry K Linzell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:22
CPC Classifications
D; D21; D21J; D21J1/00; D21J1/08; C; C08; C08L; C08L91/00; C08L97/00; C08L97/02
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) | 1943-09-17 | 1944-03-18 | 1944-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-09-17 | 1948-03-18 | 1948-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-09-17 | 1952-03-18 | 1952-09-17 | $7700.00 | Window Closed / Lapsed |