Patent US3313643A successfully refreshed from Google Patents.
US3313643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making phosphor screens
Assignee: RCA Corp
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Filing: 1966-06-21
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Granted: 1967-04-11
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Expires: 1986-06-21
Abstract
No abstract record available.
Inventors
- 👤 Phyllis B Branin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:02
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221; H01J9/223; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/187
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
THE METHOD OF MAKING A PLURALITY OF PHOSPHOR SCREENS COMPRISING THE STEPS OF: (A) APPLYING A PORTION OF INITIAL SLURRY ONTO A FIRST SUBSTRATE, SAID INITIAL SLURRY INCLUDING PHOSPHOR PARTICLES PREDOMINANTLY IN THE SIZE RANGE OF 1 TO 20 MICRONS WITH A MINOR WEIGHT PROPORTION OF SAID PARTICLES GREATER THAN 10 MICRONS IN SIZE, SAID PORTION OF INITIAL SLURRY BEING MORE THAN THAT REQUIRED TO PROVIDE A COATING OF DESIRED THICKNESS ON SAID FIRST SUBSTRATE, (B) SPREADING SAID PORTION OF INITIAL SLURRY OVER SAID FIRST SUBSTRATE TO SAID DESIRED THICKNESS, (C) REMOVING FROM SAID FIRST SUBSTRATE THE FRACTION OF SAID PORTION OF INITIAL SLURRY WHICH IS IN EXCESS OF THAT REQUIRED TO PROVIDE SAID COATING OF SAID DESIRED THICKNESS, (D) MIXING SAID REMOVED FRACTION WITH MAKEUP SLURRY TO PRODUCE A RECONSTITUTED SLURRY, SAID MAKEUP SLURRY CONTAINING PHOSPHOR PARTICLES PREDOMINANTLY IN THE SIZE RANGE OF 1 TO 20 MICRONS WITH A LARGER WEIGHT PROPORTION OF PARTICLES GREATER THAN 10 MICRONS IN SIZE THAN THE MINOR WEIGHT PROPORTION IN SAID INITIAL SLURRY, (E) AND THEN DISPENSING A PORTION OF SAID RECONSTITUTED SLURRY ONTO A SECOND SUBSTRATE.
Claim 2
Independent Claim
184 words
THE METHOD OF MAKING A PLURALITY OF PHOSPHOR SCREENS COMPRISING THE STEPS OF: (A) APPLYING A PORTION OF INITIAL SLURRY ONTO A FIRST SUBSTRATE, SAID INITIAL SLURRY INCLUDING PHOSPHOR PARTICLES PREDOMINANTLY IN THE SIZE RANGE OF 1 TO 20 MICRONS WITH A MINOR WEIGHT PROPORTION OF SAID PARTICLES GREATER THAN 10 MICRONS IN SIZE, SAID PORTION OF INITIAL SLURRY BEING MORE THAN THAT REQUIRED TO PROVIDE A COATING OF DESIRED THICKNESS ON SAID FIRST SUBSTRATE, (B) SPREADING SAID PORTION OF INITIAL SLURRY OVER SAID FIRST SUBSTRATE TO SAID DESIRED THICKNESS, (C) REMOVING FROM SAID FIRST SUBSTRATE THE FRACTION OF SAID PORTION OF INITIAL SLURRY WHICH IS IN EXCESS OF THAT REQUIRED TO PROVIDE SAID COATING OF SAID DESIRED THICKNESS, (D) MIXING SAID REMOVED FRACTION WITH MAKEUP SLURRY TO PRODUCE A RECONSTITUTED SLURRY, SAID MAKEUP SLURRY CONTAINING PHOSPHOR PARTICLES PREDOMINANTLY IN THE SIZE RANGE OF 1 TO 20 MICRONS WITH A LARGER WEIGHT PROPORTION OF PARTICLES GREATER THAN 10 MICRONS IN SIZE THAN THE MINOR WEIGHT PROPORTION IN SAID INITIAL SLURRY, (E) AND THEN DISPENSING A PORTION OF SAID RECONSTITUTED SLURRY ONTO A SECOND SUBSTRATE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |