Patent US3785998A successfully refreshed from Google Patents.
Patent US2672104A successfully refreshed from Google Patents.
US2672104A
Expired / Lapsed
US
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Baking pan, coating compounds, and methods of preparation and baking
Assignee: Dow Silicones Corp
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Filing: 1949-09-02
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Granted: 1954-03-16
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Expires: 1969-09-02
Abstract
No abstract record available.
Inventors
- 👤 Harold A Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:15
CPC Classifications
A; A21; A21D; A21D8/00; A21D8/08; C; C08; C08G; C08G77/00; Y; Y10; Y10S; Y10S220/00; Y10S220/912
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
THE METHOD OF PREPARING AN ORGANOPOLYSILANE-POLYSILOXANE RESIN WHICH COMPRISES HYDROLYZING THE REACTION WITH WATER OF AN ORGANOCHLOROPOLYSILANE WHICH HAS THE GENERAL FORMULA (CH3) A (C6H5) BSICL(4-A-B)(1/M) IN WHICH A+B HAS A VALUE OF FROM 1.4 TO 2 INCLUSIVE AND IN WHICH M HAS A VALUE OF MORE THAN 1 AND LESS THAN 5, AND PARTIALLY CONDENSING HYDROXYL RADICALS, WHEREBY THERE IS PRODUCED AN ORGANOPOLYSILANE-POLYSILOXANE RESIN WITH AN AVERAGE COMPOSITON OF (CH3)A(C6H5)BSIOC(OH)D) IN WHICH C HAS A POSITIVE VALUE, D HAS A VALUE OF FROM .01 TO 1, AND A+B+2C+D HAS A VALUE OF UP TO 3.5.
Claim 2
Dependent Claim
46 words
ALKOXYPOLYSILANES WITH THE GENEARL FORMULA (CH3)A(C6H5)BSI(OR'')(4-A-B)(1-1/M) IN WHICH A+B HAS A VALUE OF FROM 1.4 TO 2 INCLUSIVE, M HAS A VALUE OF MORE THAN 1 AND LESS THAN 5 AND R'' IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF PRIMARY AND SECONDARY ALKYL RADICALS.
Claim 3
Dependent Claim
7 words
ORGANOPOLYSILANE-POLYSILOXANE RESINS WITH AN AVERAGE COMPOSITION OF
Claim 4
Independent Claim
113 words
THE METHOD WHICH COMPRISES COATING THE INTERNAL SURFACES OF A BREAD PAN WITH AN ORGANOPOLYSILANE-POLYSILOXANE RESIN WITH AN AVERAGE COMPOSITION OF (CH3)A(C6H5)BSIOC(OH)D) IN WHICH A+B HAS A VALUE OF 1.4 TO 2 INCLUSIVE, C HAS A POSITIVE VALUE, D HAS A VALUE OF FROM .01 TO 1, A+B+2C+D HAS A VALUE OF UP FROM 3.5, AND IN WHICH FROM 30 TO 75 PER CENT OF LTHE TOALTAL METHYL AND PHENYL RADICALS ARE PHENYL RADICALS, CURING THE RESIN BY HEATING AND REPEATEDLY BAKING BREAD IN THE PAN SO COATED WITH THE BREAD IN CONTACT WITH THE RESIN DURING BAKING, WHEREBY RELEASE OF THE BREAD IN THE PAN IS OBTAINED WITHOUT THE USE OF GREASE.
Claim 5
Dependent Claim
75 words
A BREAD PAN HAVING A COOKING SURFACE CONSISTING OF A THIN COATING OF A HARDENED ORGANOPOLYSILANE-POLYSILOXANE RESIN WITH AN AVERAGE COMPOSITION OF (CH3)A(C6H5)BSIOC(OH)D) IN WHICH A+B HAS A VALUE OF FROM 1.4 TO 2 INCLUSIVE, C HAS A POSITIVE VALUE, D HAS A VALUE OF FROM .01 TO 1,A+B+2C+D HAS A VALUE OF UP TO 3.5 AND IN WHICH FROM 30 TO 75 PER CENT OF THE TOTAL METHYL AND PHENYL RADICALS ARE PHENYL RADICALS.
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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) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |