US3523761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction vessel with coil contact heat exchange
Assignee: STRATFORD ENG CORP
•
Filing: 1966-10-04
•
Granted: 1970-08-11
•
Expires: 1986-10-04
Abstract
No abstract record available.
Inventors
- 👤 Ward A Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:32
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/1868; B01J19/1875; B01F; B01F35/00; B01F35/90; B01F35/93
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2071624A
Cited
US2367149A
Cited
US2577856A
Cited
US2800307A
Cited
US3302700A
Cited
US3288567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |