US1691562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for electrically heating metal parts
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1926-11-17
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Granted: 1928-11-13
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Expires: 1946-11-17
Abstract
No abstract record available.
Inventors
- 👤 Richard E Bissell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:08
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/10
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) | 1931-11-13 | 1932-05-14 | 1932-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-11-13 | 1936-05-14 | 1936-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-11-13 | 1940-05-14 | 1940-11-13 | $7700.00 | Window Closed / Lapsed |