Patent US1965770A successfully refreshed from Google Patents.
US1965770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of acetylene
Assignee: Shell Development Co
•
Filing: 1931-10-06
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Granted: 1934-07-10
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Expires: 1951-10-06
Abstract
No abstract record available.
Inventors
- 👤 Burgin James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:26
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/76; C07C2/78; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/943
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) | 1937-07-09 | 1938-01-08 | 1938-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-07-09 | 1942-01-08 | 1942-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-07-09 | 1946-01-08 | 1946-07-10 | $7700.00 | Window Closed / Lapsed |