Patent US2643202A successfully refreshed from Google Patents.
US2643202A
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Method of making nonblocking film of rubber hydrochloride
Assignee: Wingfoot Corp
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Filing: 1950-08-01
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Granted: 1953-06-23
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Expires: 1970-08-01
Abstract
No abstract record available.
Inventors
- 👤 Drury R Burton
- 👤 Harry W Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:53
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/06; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24364; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/31504; Y10T428/31826; Y10T428/31844; Y10T428/31848; Y10T428/31851
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A METHOD OF PREVENTING BLOCKING OF THERMOPLASTIC HEAT TACKIFIED RUBBER HYDROCHLORIDE SEAL SURFACES WHICH COMPRISES APPLYING TO SAID SURFACES A DISPERSION OF FINELY DIVIDED PULVERULENT SULPHUR IN MINERAL OIL.
Claim 2
Independent Claim
29 words
A METHOD OF PREVENTING BLOCKING OF THERMOPLASTIC HEAT TACKIFIED RUBBER HYDROCHLORIDE SEAL SURFACES WHICH COMPRISES APPLYING TO SAID SURFACES A DISPERSION OF FINELY DIVIDED PULVERULENT SULPHUR IN MINERAL OIL.
References Cited (Backward Citations)
US1516598A
Cited
US1377729A
Cited
US1352163A
Cited
US2238342A
Cited
US2340774A
Cited
US2431873A
Cited
US2480010A
Cited
US2545710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |