US3221480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated foraminous fibrous gas filter
Assignee: GAF Chemicals Corp
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Filing: 1961-12-27
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Granted: 1965-12-07
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Expires: 1981-12-27
Abstract
No abstract record available.
Inventors
- 👤 Stefcik Andrew
- 👤 Fred E Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:40
CPC Classifications
B; B01; B01D; B01D46/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A FORAMINOUS FIBROUS GAS FILLER, (1) THE INDIVIDUAL FIBERS OF WHICH ARE COATED (2) WITH A SUBSTANTIALLY NON-VOLATILE VISCOUS LIQUID FILM CONSISTING ESSENTIALLY OF (3) A MEMBER OF THE GROUP CONSISTING OF (A) FREE MONO- AND DI-ACID PHOSPHATE ESTERS OF A CONDENSATION PRODUCT OF ABOUT 2.5 TO 7 MOLES OF AN ALKYLENE OXIDE OF 2 TO 4 CARBON ATOMS WITH ONE MOLE OF AN AROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A-1) PHENOL, (A-2) NAPHTHOL, (A-3) MONO- DI- AND TRICHLORINATED- AND -BROMINATED PHENOL AND -NAPHTHO, AND (A-4) MONO-, DI- AND TRI-ALKYLATED-PHENOL AND -NAPHTHOL CONTAINING A MAXIMUM OF ABOUT 6 ALKYL CARBON ATOMS; (B) THE METAL AND AMMONIUM SALTS OF SUCH FREE ACID PHOSPHATE ESTERS, AND (C) MIXTURES THEREOF.
Claim 2
Dependent Claim
119 words
A FORAMINOUS FIBROUS GAS FILLER, (1) THE INDIVIDUAL FIBERS OF WHICH ARE COATED (2) WITH A SUBSTANTIALLY NON-VOLATILE VISCOUS LIQUID FILM CONSISTING ESSENTIALLY OF (3) A MEMBER OF THE GROUP CONSISTING OF (A) FREE MONO- AND DI-ACID PHOSPHATE ESTERS OF A CONDENSATION PRODUCT OF ABOUT 2.5 TO 7 MOLES OF AN ALKYLENE OXIDE OF 2 TO 4 CARBON ATOMS WITH ONE MOLE OF AN AROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A-1) PHENOL, (A-2) NAPHTHOL, (A-3) MONO- DI- AND TRICHLORINATED- AND -BROMINATED PHENOL AND -NAPHTHO, AND (A-4) MONO-, DI- AND TRI-ALKYLATED-PHENOL AND -NAPHTHOL CONTAINING A MAXIMUM OF ABOUT 6 ALKYL CARBON ATOMS; (B) THE METAL AND AMMONIUM SALTS OF SUCH FREE ACID PHOSPHATE ESTERS, AND (C) MIXTURES THEREOF.
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |