US3377286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developer powder containing black magnetic iron oxide
Assignee: 3M Co
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Filing: 1965-01-19
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Granted: 1968-04-09
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Expires: 1985-01-19
Abstract
No abstract record available.
Inventors
- 👤 Stricklin Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:32
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/398
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A DEVELOPER POWDER ADAPTED FOR DEVELOPING A PERMANENT VISIBLE IMAGE ON A PAPER COPY-SHEET HAVIG A FLUID METASTABLE LIQUID LATENT IMAE, COMPRISING A MASS OF COLORED PARTICLES OF A MIXTURE OF COMPONENTS CONSISTING ESSENTIALLY OF A THERMOPLASTIC BINDER AND A BLACK MAGNETIC IRON OXIDE POWDER, SAID PARTICLES HAVING A PARTICLE SIZE WITHIN THE RANGE OF 10-40 MICRONS AND MOSTLY WITHIN THE RANGE OF ABOUT 20-35 MICRONS, A SPECIFIC GRAVITY WITHIN THE RANGE OF 1.89-2.3, AND BEING ADHERENTLY RETAINED WHEN PLACED MOMENTARILY IN CONTACT WITH COOLED LIQUIFIED BENZILE.
Claim 2
Dependent Claim
87 words
A DEVELOPER POWDER ADAPTED FOR DEVELOPING A PERMANENT VISIBLE IMAGE ON A PAPER COPY-SHEET HAVIG A FLUID METASTABLE LIQUID LATENT IMAE, COMPRISING A MASS OF COLORED PARTICLES OF A MIXTURE OF COMPONENTS CONSISTING ESSENTIALLY OF A THERMOPLASTIC BINDER AND A BLACK MAGNETIC IRON OXIDE POWDER, SAID PARTICLES HAVING A PARTICLE SIZE WITHIN THE RANGE OF 10-40 MICRONS AND MOSTLY WITHIN THE RANGE OF ABOUT 20-35 MICRONS, A SPECIFIC GRAVITY WITHIN THE RANGE OF 1.89-2.3, AND BEING ADHERENTLY RETAINED WHEN PLACED MOMENTARILY IN CONTACT WITH COOLED LIQUIFIED BENZILE.
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) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |