US2173815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat insulating material and method of forming the same
Assignee: United States Gypsum Co
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Filing: 1937-05-19
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Granted: 1939-09-19
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Expires: 1957-05-19
Abstract
No abstract record available.
Inventors
- 👤 Theodore B Slisz
- 👤 Clyde C Sehuetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:19
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/08; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/7608; E04B1/7612; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1016; Y10T156/1018; Y10T156/102; Y10T156/1025; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24496; Y10T428/24521; Y10T428/24545
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) | 1942-09-18 | 1943-03-20 | 1943-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-09-18 | 1947-03-20 | 1947-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-09-18 | 1951-03-20 | 1951-09-19 | $7700.00 | Window Closed / Lapsed |