US2684812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal decomposition retardation system
Assignee: John B. Pierce Laboratory
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Filing: 1952-04-25
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Granted: 1954-07-27
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Expires: 1972-04-25
Abstract
No abstract record available.
Inventors
- 👤 Richard A Ahlbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:52
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0006; B01J19/0013; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/0009; B01J2219/00105; B01J2219/0011; B01J2219/00162; B01J2219/00164
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |