US2406908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the manufacture of formaldehyde
Assignee: Chemical Construction Corp
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Filing: 1942-11-28
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Granted: 1946-09-03
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Expires: 1962-11-28
Abstract
No abstract record available.
Inventors
- 👤 Schideler Pierre
- 👤 Ralph S Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:39
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/37; C07C45/38; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00168; B01J2208/00194; B01J2208/00212; B01J2208/00221; B01J2208/00504; B01J2208/0053
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) | 1949-09-02 | 1950-03-04 | 1950-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-09-02 | 1954-03-04 | 1954-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-09-02 | 1958-03-04 | 1958-09-03 | $7700.00 | Window Closed / Lapsed |