US3425795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing superdense sodium carbonate from wyoming trona and the product thereof
Assignee: Honeywell International Inc
•
Filing: 1966-08-09
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Granted: 1969-02-04
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Expires: 1986-08-09
Abstract
No abstract record available.
Inventors
- 👤 Carlton J Howard
- 👤 Eugene B Port
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:59
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/12; C01D7/126; C01D7/35; C01D7/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1650244A
Cited
US1907987A
Cited
US2133455A
Cited
US2343081A
Cited
US3260567A
Cited
US3236590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |