Patent US1702985A successfully refreshed from Google Patents.
US1702985A
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US
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Heat treatment of metal articles
Assignee: ADAM HILGER Ltd
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Filing: 1928-03-31
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Granted: 1929-02-19
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Expires: 1948-03-31
Abstract
No abstract record available.
Inventors
- 👤 Twyman Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:45
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/06; C21D1/09; C21D1/10; Y; Y02; Y02P; Y02P10/00; Y02P10/25; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49703
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) | 1932-02-19 | 1932-08-20 | 1933-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-02-19 | 1936-08-20 | 1937-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-02-19 | 1940-08-20 | 1941-02-19 | $7700.00 | Window Closed / Lapsed |