Patent US1618368A successfully refreshed from Google Patents.
Patent US3158669A successfully refreshed from Google Patents.
US3158669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary intaglio printing of rubber gaskets and similar shapes
Assignee: WR Grace and Co
•
Filing: 1961-04-03
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Granted: 1964-11-24
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Expires: 1981-04-03
Abstract
No abstract record available.
Inventors
- 👤 David G Greenlie
- 👤 Edward W Merrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:16
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0082; B29D99/0053; B29L; B29L2031/00; B29L2031/26; B29L2031/709
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A METHOD OF FORMING A MULTIPLICITY OF GASKET SHAPES COMPRISING FILLING A MULTIPLICITY OF MOLDED CAVITIES OF THE DESIRED SHAPE IN A PRINTING SURFACE WITH A LIQUID POLYMERIC GASKET-FORMING COMPOSITION HAVING A VISCOSITY BETWEEN ABOUT 10 AND 300 CENTIPOISES AT 21*C. AND CAPABLE OF SETTING TO A FORM-STABLE SOLID AT AN ELEVATED TEMPERATURE, FIRMLY AND EVENLY PLACING A FORM-STABLE, PAPER-REINFORCED, GAS IMPERVIOUS SUBSTRATUM AGAINST SAID PRINTING SURFACE, APPLYING HEAT TO THE INTERIOR PORTION OF SAID MOLD CAVITIES TO OBTAIN SETTING OF SAID COMPOSITION TO THE FORM-STABLE SHAPES, REMOVING THE COMPOSITE OF SAID SUBSTRATUM WITH SAID SHAPES ADHERED THERETO FROM SAID PRINTING SURFACE AND THEREAFTER PUNCHING THE RESULTING COMPOSITE INTO INDIVIDUAL GASKET UNITS.
Claim 2
Independent Claim
112 words
A METHOD OF FORMING A MULTIPLICITY OF GASKET SHAPES COMPRISING FILLING A MULTIPLICITY OF MOLDED CAVITIES OF THE DESIRED SHAPE IN A PRINTING SURFACE WITH A LIQUID POLYMERIC GASKET-FORMING COMPOSITION HAVING A VISCOSITY BETWEEN ABOUT 10 AND 300 CENTIPOISES AT 21*C. AND CAPABLE OF SETTING TO A FORM-STABLE SOLID AT AN ELEVATED TEMPERATURE, FIRMLY AND EVENLY PLACING A FORM-STABLE, PAPER-REINFORCED, GAS IMPERVIOUS SUBSTRATUM AGAINST SAID PRINTING SURFACE, APPLYING HEAT TO THE INTERIOR PORTION OF SAID MOLD CAVITIES TO OBTAIN SETTING OF SAID COMPOSITION TO THE FORM-STABLE SHAPES, REMOVING THE COMPOSITE OF SAID SUBSTRATUM WITH SAID SHAPES ADHERED THERETO FROM SAID PRINTING SURFACE AND THEREAFTER PUNCHING THE RESULTING COMPOSITE INTO INDIVIDUAL GASKET UNITS.
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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) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |