Patent US2805621A successfully refreshed from Google Patents.
US2805621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper planographic plate
Assignee: Standard Register Co
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Filing: 1954-02-10
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Granted: 1957-09-10
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Expires: 1974-02-10
Abstract
No abstract record available.
Inventors
- 👤 Howard H Pickrel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:33
CPC Classifications
B; B41; B41C; B41C1/00; B41C1/10; B41C1/1091; B41N; B41N3/00; B41N3/03; B41N3/036
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PLANOGRAPHIC PRINTING PLATE COMPRISING A BOND PAPER BASE SHEET HAVING THEREIN A TOUGH, FLEXIBLE, FIRMLYADHERING COATING, IN THICKNESS OF FROM 1 TO 5 THOUSANDTHS OF AN INCH, WHICH RESULTS FROM THE APPLICATION TO ONE SURFACE OF SAID SHEET AND SUBSEQUENTLY HEATING, A COMPOSITION CONSISTING ESSENTIALLY OF AN EMULSION CONTAINING 10-40 G. SODIUM CARBOXYMETHYLCELLULOSE, 10-40G. MELAMINE-FORMALDEHYDE IN THE THERMOSETTING STAGE, 10-40 G. AMMONIUM NITRATE, 5-20 CC. AMMONIUM HYDROXIDE, 0-50 CC. GLYCERIN AND 300-800 CC. WATER, SAID COATED SHEET BEING HEATED AT 200*-400*F. FOR 30 MINUTES.
Claim 2
Dependent Claim
85 words
A PLANOGRAPHIC PRINTING PLATE COMPRISING A BOND PAPER BASE SHEET HAVING THEREIN A TOUGH, FLEXIBLE, FIRMLYADHERING COATING, IN THICKNESS OF FROM 1 TO 5 THOUSANDTHS OF AN INCH, WHICH RESULTS FROM THE APPLICATION TO ONE SURFACE OF SAID SHEET AND SUBSEQUENTLY HEATING, A COMPOSITION CONSISTING ESSENTIALLY OF AN EMULSION CONTAINING 10-40 G. SODIUM CARBOXYMETHYLCELLULOSE, 10-40G. MELAMINE-FORMALDEHYDE IN THE THERMOSETTING STAGE, 10-40 G. AMMONIUM NITRATE, 5-20 CC. AMMONIUM HYDROXIDE, 0-50 CC. GLYCERIN AND 300-800 CC. WATER, SAID COATED SHEET BEING HEATED AT 200*-400*F. FOR 30 MINUTES.
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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) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |