US1725243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of ends and edges of burned gypsum boards
Assignee: United States Gypsum Co
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Filing: 1927-12-30
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Granted: 1929-08-20
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Expires: 1947-12-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Sewell L Avery
- 👤 Morris H Basquin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:27
CPC Classifications
C; C04; C04B; C04B40/00; B; B28; B28B; B28B11/00; B28B11/24; C04B28/00; C04B28/14; C04B28/141
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) | 1932-08-19 | 1933-02-18 | 1933-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-08-19 | 1937-02-18 | 1937-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-08-19 | 1941-02-18 | 1941-08-20 | $7700.00 | Window Closed / Lapsed |