US2733992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
reyerson
Assignee: —
•
Filing: —
•
Granted: 1956-02-07
•
Expires: 1973-02-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:07
CPC Classifications
D; D21; D21C; D21C7/00; D21C3/00; D21C3/04; D21C3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN THE PROCESS OF PRODUCING WOOD PULP THE IMPROVEMENT WHICH CONSISTS ESSENTIALLY OF INTRODUCING WOOD IN DIVIDED FORM INTO A TREATING ZONE ALONG WITH SUFFICIENT MOISTURE SO AS THOROUGHLY TO WET THE WOOD, INTRODUCING INTO AND PASSING THROUGH SAID TREATING ZONE A MIXTURE OF FURNACE GASES COMPRISING OXIDES OF NITROGEN IN AN AMOUNT RANGING FROM .8% TO 2% BY VOLUME OF THE FURNACE GASES AND CALCULATED ON THE BASIS OF NITRIC OXIDE, SAID FURNACE GASES BEING INTRODUCED PROGRESSIVELY DURING THE COURSE
Claim 2
Dependent Claim
81 words
IN THE PROCESS OF PRODUCING WOOD PULP THE IMPROVEMENT WHICH CONSISTS ESSENTIALLY OF INTRODUCING WOOD IN DIVIDED FORM INTO A TREATING ZONE ALONG WITH SUFFICIENT MOISTURE SO AS THOROUGHLY TO WET THE WOOD, INTRODUCING INTO AND PASSING THROUGH SAID TREATING ZONE A MIXTURE OF FURNACE GASES COMPRISING OXIDES OF NITROGEN IN AN AMOUNT RANGING FROM .8% TO 2% BY VOLUME OF THE FURNACE GASES AND CALCULATED ON THE BASIS OF NITRIC OXIDE, SAID FURNACE GASES BEING INTRODUCED PROGRESSIVELY DURING THE COURSE
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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) | 1959-02-06 | 1959-08-08 | 1960-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-06 | 1963-08-08 | 1964-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-06 | 1967-08-08 | 1968-02-07 | $7700.00 | Window Closed / Lapsed |