Patent US788485A successfully refreshed from Google Patents.
Patent US2071841A successfully refreshed from Google Patents.
US2071841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating process
Assignee: International Patents Development Co
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Filing: 1935-06-14
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Granted: 1937-02-23
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Expires: 1955-06-14
Abstract
No abstract record available.
Inventors
- 👤 Alfred H Kelling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:19
CPC Classifications
A; A23; A23L; A23L2/00; A23L2/385; A23L2/39
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) | 1940-02-23 | 1940-08-24 | 1941-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-02-23 | 1944-08-24 | 1945-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-02-23 | 1948-08-24 | 1949-02-23 | $7700.00 | Window Closed / Lapsed |