US2844491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper-like pellicle and method for producing same
Assignee: EIDP Inc
•
Filing: 1955-04-29
•
Granted: 1958-07-22
•
Expires: 1975-04-29
Abstract
No abstract record available.
Inventors
- 👤 James K Hubbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:08
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/55; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/587; D04H1/64; D21H13/00; D21H13/10; D21H13/20; D21H13/26; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/29; Y10T428/2904; Y10T428/2905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A PROCESS OF PREPARING A PAPER-LIKE PELLICLE WHICH COMPRISES IMPREGNATING AN UNWOVEN WEB OF A MOLECULARLY ORIENTED SYNTHETIC CONDENSATION POLYAMIDE FIBER WITH AN AQUEOUS DISPERSION OF AN N-ALKOXYMETHYLPOLYAMIDE AND THEREAFTER SUBJECTING THE IMPREGNATED MASS TO HEAT AND PRESSURE.
Claim 2
Dependent Claim
38 words
A PROCESS OF PREPARING A PAPER-LIKE PELLICLE WHICH COMPRISES IMPREGNATING AN UNWOVEN WEB OF A MOLECULARLY ORIENTED SYNTHETIC CONDENSATION POLYAMIDE FIBER WITH AN AQUEOUS DISPERSION OF AN N-ALKOXYMETHYLPOLYAMIDE AND THEREAFTER SUBJECTING THE IMPREGNATED MASS TO HEAT AND PRESSURE.
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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |