US3252502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal wiped film evaporation process for viscous materials
Assignee: Honeywell International Inc
•
Filing: 1962-01-19
•
Granted: 1966-05-24
•
Expires: 1982-01-19
Abstract
No abstract record available.
Inventors
- 👤 Carl R Eckardt
- 👤 Howard L Payntar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 22:50
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/22; B01D1/222; B01D1/223; B01D1/225; B01D1/226
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2752336A
Cited
US2939865A
Cited
US2766193A
Cited
US2857962A
Cited
FR1123231A
Cited
US2812019A
Cited
US2931433A
Cited
US2927634A
Cited
US3058516A
Cited
US2992679A
Cited
US3067812A
Cited
US3130108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |