US2416035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gypsum compositions capable of setting at elevated temperatures
Assignee: United States Gypsum Co
•
Filing: 1944-09-21
•
Granted: 1947-02-18
•
Expires: 1964-09-21
Abstract
No abstract record available.
Inventors
- 👤 William A Whittier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:43
CPC Classifications
C; C04; C04B; C04B22/00; C04B22/08; C04B22/10; C04B28/00; C04B28/14; C09; C09K; C09K8/00; C09K8/42; C09K8/46; C09K8/467
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US397529A
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GB190502467A
Cited
US1620915A
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US1901054A
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US2078200A
Cited
US2292616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-17 | 1950-08-19 | 1951-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-17 | 1954-08-19 | 1955-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-17 | 1958-08-19 | 1959-02-18 | $7700.00 | Window Closed / Lapsed |