Patent US3299531A successfully refreshed from Google Patents.
US3299531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Papermaking machine
Assignee: Kimberly Clark Corp
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Filing: 1964-08-21
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Granted: 1967-01-24
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Expires: 1984-08-21
Abstract
No abstract record available.
Inventors
- 👤 Don H Kutchera
- 👤 Robert M Eiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:57
CPC Classifications
D; D21; D21F; D21F5/00; D21F5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A DRIER DRUM COMPRISING AN OUTER CYLINDRICAL SHELL, A HEAD ON EACH END OF SAID SHELL AND FORMING A STEAM RECEIVING CAVITY WITHIN THE SHELL, A PAIR OF JOURNALS ON OPPOSITE ENDS OF THE DRUM FOR ROTATABLY MOUNTING THE DRUM, AND MEANS FOR INTRODUCING STEAM INTO SAID CAVITY, SAID SHELL ON ITS INNER SURFACE BEING PROVIDED WITH RIBS AND GROOVES EXTENDING GENERALLY CIRCUMFERENTIALLY, SAID GROOVES GRADUALLY DECREASING IN DEPTH AT THE ENDS OF THE SHELL FOR DECREASING THE TRANSMISSION OF HEAT THROUGH THE SHELL AND FOR REDUCING THE LOCAL STRESSES AT THE ENDS OF THE SHELL.
Claim 2
Dependent Claim
96 words
A DRIER DRUM COMPRISING AN OUTER CYLINDRICAL SHELL, A HEAD ON EACH END OF SAID SHELL AND FORMING A STEAM RECEIVING CAVITY WITHIN THE SHELL, A PAIR OF JOURNALS ON OPPOSITE ENDS OF THE DRUM FOR ROTATABLY MOUNTING THE DRUM, AND MEANS FOR INTRODUCING STEAM INTO SAID CAVITY, SAID SHELL ON ITS INNER SURFACE BEING PROVIDED WITH RIBS AND GROOVES EXTENDING GENERALLY CIRCUMFERENTIALLY, SAID GROOVES GRADUALLY DECREASING IN DEPTH AT THE ENDS OF THE SHELL FOR DECREASING THE TRANSMISSION OF HEAT THROUGH THE SHELL AND FOR REDUCING THE LOCAL STRESSES AT THE ENDS OF THE SHELL.
References Cited (Backward Citations)
US1453113A
Cited
US2521371A
Cited
US3099543A
Cited
US2893136A
Cited
US3169050A
Cited
US3258851A
Cited
US3241251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |