US2722734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reconstruction of chemical equipment
Assignee: Individual
•
Filing: 1951-06-07
•
Granted: 1955-11-08
•
Expires: 1971-06-07
Abstract
No abstract record available.
Inventors
- 👤 Grant Alvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:16
CPC Classifications
C; C23; C23D; C23D13/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49718; Y10T29/49732; Y10T29/49734
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1397167A
Cited
US1947493A
Cited
US2157456A
Cited
US2229526A
Cited
US2265352A
Cited
GB558410A
Cited
US2355174A
Cited
US2463561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |