US3256339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of formaldehyde
Assignee: Texaco Inc
•
Filing: 1960-12-29
•
Granted: 1966-06-14
•
Expires: 1980-12-29
Abstract
No abstract record available.
Inventors
- 👤 Edward L Cole
- 👤 Edwin C Knowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:03
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/37; C07C45/38; Y; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/92; Y10S585/921
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2644800A
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US2868702A
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US2743264A
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US2826724A
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US2866692A
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US2965583A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |