US3206917A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deaerated stock flow control
Assignee: Clark and Vicario Corp
•
Filing: 1961-10-04
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Granted: 1965-09-21
•
Expires: 1981-10-04
Abstract
No abstract record available.
Inventors
- 👤 Robert G Kaiser
- 👤 John C Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:35
CPC Classifications
B; B01; B01D; B01D19/00; B01D19/0042; B01D19/0047; D; D21; D21D; D21D5/00; D21D5/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
APPARATUS FOR PROVIDING A CONSTANT FLOW OF DEAERATED AQUEOUS PAPERMAKING STOCK TO A POINT OF USE, COMPRISING AN ENCLOSED STOCK RECEIVER ADAPTED TO COLLECT DEAERATED PAPERMAKING STOCK AS A POND THEREIN AND PROVIDE A SPACE ABOVE THE POND, EVACUATING MEANS IN COMMUNICATION WITH THE SPACE ABOVE THE POND IN SAID RECEIVER FOR MAINTAINING THE RECEIVER UNDER A VACUUM SUFFICIENT TO DEAERATE PAPERMAKING STOCK SUBSEQUENTLY SPRAYED THEREINTO, MEANS FOR SPRAYING AIR-CONTAINING AQUEOUS PAPERMAKING STOCK INTO THE EVACUATED SPACE IN SAID RECEIVER, MEANS FOR WITHDRAWING DEAERATED STOCK COLLECTED AS A POND IN SAID RECEIVER AND FOR CONVEYING THE WITHDRAWN
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |