Patent US2121512A successfully refreshed from Google Patents.
US2121512A
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US
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Weatherproof panel structure and method of making same
Assignee: INTERNAT DOOR Co
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Filing: 1936-05-09
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Granted: 1938-06-21
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Expires: 1956-05-09
Abstract
No abstract record available.
Inventors
- 👤 John W Shields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:18
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/70; E06B3/72; E06B3/74; E06B3/88; E06B2003/7059; E06B2003/7061; E06B2003/7067; E06B2003/7071
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) | 1941-06-20 | 1941-12-20 | 1942-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-06-20 | 1945-12-20 | 1946-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-06-20 | 1949-12-20 | 1950-06-21 | $7700.00 | Window Closed / Lapsed |