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Patent US1916370A successfully refreshed from Google Patents.
US1916370A
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Assignee: FREYN ENGINEERING Co
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Filing: 1931-03-06
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Granted: 1933-07-04
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Expires: 1951-03-06
Abstract
No abstract record available.
Inventors
- 👤 Jr John C Hayes
- 👤 Charles G Bigelow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:24
CPC Classifications
C; C21; C21B; C21B9/00; C21B9/02; C21B9/06; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/03; Y10S165/032
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) | 1936-07-03 | 1937-01-02 | 1937-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-07-03 | 1941-01-02 | 1941-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-07-03 | 1945-01-02 | 1945-07-04 | $7700.00 | Window Closed / Lapsed |