Patent US4488327A successfully refreshed from Google Patents.
Patent US2553154A successfully refreshed from Google Patents.
US2553154A
Expired / Lapsed
US
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Method of waterproofing and flameproofing paper
Assignee: Paper Patents Co
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Filing: 1945-10-03
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Granted: 1951-05-15
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Expires: 1965-10-03
Abstract
No abstract record available.
Inventors
- 👤 Voigtman Edward Hugo
- 👤 Bletzinger John Calvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:11
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/34; D21H17/00; D21H17/60; D21H17/61; D21H21/16; D21H5/00; D21H5/0002; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
THE IMPROVED PROCESS OF MANUFACTURING A WATER AND FLAME RESISTANT PAPER SHEET WHICH COMPRISES THE STEPS OF FIRST APPLYING AN AQUEOUS EMULSION OF ASPHALT TO A SHEET OF PAPER, THEN WHILE SAID SHEET IS WET WITH SAID ASPHALT EMULSION, APPLYING A SECOND EMULSION, THE CONTINUOUS PHASE OF WHICH COMPRISES AN AQUEOUS SOLUTION OF A FIRE INHIBITING SALT WHICH IS A STRONG ELECTROLYTE AND THE DISCONTINUOUS PHASE OF WHICH COMPRISES A WATER RESISTANT WAX, AND FINALLY DRYING THE SHEET.
Claim 2
Dependent Claim
78 words
THE IMPROVED PROCESS OF MANUFACTURING A WATER AND FLAME RESISTANT PAPER SHEET WHICH COMPRISES THE STEPS OF FIRST APPLYING AN AQUEOUS EMULSION OF ASPHALT TO A SHEET OF PAPER, THEN WHILE SAID SHEET IS WET WITH SAID ASPHALT EMULSION, APPLYING A SECOND EMULSION, THE CONTINUOUS PHASE OF WHICH COMPRISES AN AQUEOUS SOLUTION OF A FIRE INHIBITING SALT WHICH IS A STRONG ELECTROLYTE AND THE DISCONTINUOUS PHASE OF WHICH COMPRISES A WATER RESISTANT WAX, AND FINALLY DRYING THE SHEET.
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) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |