Patent US2684337A successfully refreshed from Google Patents.
US2684337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
"dacron" filler
Assignee: United States Department of the Army
•
Filing: 1952-08-21
•
Granted: 1954-07-20
•
Expires: 1972-08-21
Abstract
No abstract record available.
Inventors
- 👤 Edward R Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:57
CPC Classifications
B; B68; B68G; B68G1/00; Y; Y10; Y10S; Y10S260/00; Y10S260/23; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A HEAT INSULATING FILLER OR BATT CONSISTING OF ELECTROSTATICALLY CHARGED POLYETHYLENE TEREPHTHALATE FILAMENTS OF STAPLE LENGTH, AND AN OPPOSITELY CHARGED FEATHER PRODUCT, SAID INGREDIENTS BEING INTERMIXED SUBSTANTIALLY UNIFORMLY AND BEING IN APPROXIMATELY EQUAL PROPORTIONS BY WEIGHT.
Claim 2
Dependent Claim
36 words
A HEAT INSULATING FILLER OR BATT CONSISTING OF ELECTROSTATICALLY CHARGED POLYETHYLENE TEREPHTHALATE FILAMENTS OF STAPLE LENGTH, AND AN OPPOSITELY CHARGED FEATHER PRODUCT, SAID INGREDIENTS BEING INTERMIXED SUBSTANTIALLY UNIFORMLY AND BEING IN APPROXIMATELY EQUAL PROPORTIONS BY WEIGHT.
References Cited (Backward Citations)
US2579035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |