US2986524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of electrets and article so produced
Assignee: Individual
•
Filing: 1959-12-21
•
Granted: 1961-05-30
•
Expires: 1979-12-21
Abstract
No abstract record available.
Inventors
- 👤 Edward D Padgett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:57
CPC Classifications
H; H01; H01G; H01G7/00; H01G7/02; H01G7/021
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
62 words
AS AN ARTICLE OF MANUFACTURE, AN ELECTRET CONTAINING AS ESSENTIAL CONSTITUENTS AT LEAST 10% ESTER GUM AND AT LEAST 10% OF AT LEAST ONE WAX SELECTED FROM THE GROUP CONSISTING OF CARNAUBA, SUGAR CANE, MONTAN, OZOCERITE, SPERMACETI, BEESWAX, OURICURY, JAPAN, BAYBERRY, CANDELILLA, CHINESE AND CHINESE INSECT, THE COMBINED AMOUNT OF SAID WAX AND SAID GUM CONSTITUTING A MAJOR PROPORTION OF SAID ARTICLE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |