Patent US4802229A successfully refreshed from Google Patents.
Patent US2686119A successfully refreshed from Google Patents.
US2686119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection of paper stock against slime
Assignee: Buckman Laboratories Inc
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Filing: 1950-02-09
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Granted: 1954-08-10
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Expires: 1970-02-09
Abstract
No abstract record available.
Inventors
- 👤 Stanley J Buckman
- 👤 Robert N Meals
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:10
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
INDUSTRIAL AQUEOUS PAPER STOCK CONTAINING CARBOHYDRATE MATERIAL SUBJECT TO DAMAGE BY SLIME PRODUCING ORGANISMS SAID STOCK INCLUDING AN ORGANIC MERCURY COMPOUND SELECTED FROM THE GROUP CONSISTING OF O-HYDROXY PHENYL MERCURIC, P-HYDROXY PHENYL MERCURIC, PHENYL MERCURIC, AND PYRIDYL MERCURIC ACETATES AND CHLORIDES AND ALKALI METAL SALT OF 2,4,5-TRICHLOROPHENOL, THE AMOUNT OF MERCURY COMPOUND BEING FROM ABOUT 0.01 TO 0.15 PART BY WEIGHT, AND THE AMOUNT OF SALT BEING FROM ABOUT 0.05 TO 0.75 PART BY WEIGTH, BOTH PER 2000 PARTS BY WEIGHT OF DRY PAPER STOCK.
Claim 2
Dependent Claim
85 words
INDUSTRIAL AQUEOUS PAPER STOCK CONTAINING CARBOHYDRATE MATERIAL SUBJECT TO DAMAGE BY SLIME PRODUCING ORGANISMS SAID STOCK INCLUDING AN ORGANIC MERCURY COMPOUND SELECTED FROM THE GROUP CONSISTING OF O-HYDROXY PHENYL MERCURIC, P-HYDROXY PHENYL MERCURIC, PHENYL MERCURIC, AND PYRIDYL MERCURIC ACETATES AND CHLORIDES AND ALKALI METAL SALT OF 2,4,5-TRICHLOROPHENOL, THE AMOUNT OF MERCURY COMPOUND BEING FROM ABOUT 0.01 TO 0.15 PART BY WEIGHT, AND THE AMOUNT OF SALT BEING FROM ABOUT 0.05 TO 0.75 PART BY WEIGTH, BOTH PER 2000 PARTS BY WEIGHT OF DRY PAPER STOCK.
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) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |