Patent US1178551A successfully refreshed from Google Patents.
US1178551A
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US
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Cementation and hardening of iron and steel articles.
Assignee: Individual
•
Filing: 1915-07-31
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Granted: 1916-04-11
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Expires: 1935-07-31
Abstract
No abstract record available.
Inventors
- 👤 Georg Stolle
- 👤 Alfred Hocks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:00
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/04; Y; Y10; Y10T; Y10T137/00; Y10T137/4673; Y10T137/4857; Y10T137/8593; Y10T137/87571; Y10T137/87676; Y10T137/87684
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) | 1919-04-11 | 1919-10-11 | 1920-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1923-04-11 | 1923-10-11 | 1924-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1927-04-11 | 1927-10-11 | 1928-04-11 | $7700.00 | Window Closed / Lapsed |