US3580734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistatic film base material and process for preparing same
Assignee: Bexford Ltd
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Filing: 1967-09-21
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Granted: 1971-05-25
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Expires: 1987-09-21
Abstract
Abstract THIS APPLICATION DESCRIBES A PROCESS OF RENDERING FILM BASE LESS PRONE TO PICK UP STATIC ELECTRICITY WHICH COMPRISES COATING THE FILM BASE WITH A LAYER CONSISTING ESSENTIALLY OF A SODIUM, POTASSIUM OR LITHIUM SALT OF A COPOLYMER OF AN ALPHA-BETA UNSATURATED DICARBOXYLIC ACID OR ANHYDRIDE WITH AN ETHYLENICALLY UNSATURATED COMONOMER.
Inventors
- 👤 Margaret L Clachan
- 👤 Patrick T Mcgrail
- 👤 Basil R Shephard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:48
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03C1/89; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/044; C08J2435/00; Y; Y10; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/31504; Y10T428/31507; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 0
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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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |