Patent US3172928A successfully refreshed from Google Patents.
US3172928A
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Method for deep forming fluorocarbon polymer sheet material
Assignee: Raybestos Manhattan Inc
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Filing: 1961-08-08
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Granted: 1965-03-09
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Expires: 1981-08-08
Abstract
No abstract record available.
Inventors
- 👤 Herbert G Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:48
CPC Classifications
B; B29; B29C; B29C51/00; B29C43/00; B29C43/02; B29C43/10; B29C43/32; B29C43/36; B29C43/361; B29C51/002; B29C51/10; B29C2043/108; B29C2043/3615; B29C2043/3618; B29C2043/3621; B29K; B29K2027/00; B29K2027/12; B29K2027/18; B29K2105/00; B29K2105/25; B29K2105/253; B29K2105/258
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD FOR DEEP FORMING FLUOROCABON POLYMER SHEET WHICH COMPRISES SUPPORTING A FLUOROCARON POLYMER SHEET IN A DIE HAVING A RECESSED PORTION WITH SAID SHEET EXTENDING ACROSS THE MOUTH OF SIAD RECESSED PORTION, AND APPLYING PRESSURE TO THE SURFACE OF SAID SHEET IN A DIRECTION SUBSTANTIALLY NORMAL TO THE MOUTH OF SAID RECESSED PORTION OF SAID DIE WHILE SIMULTANEOUSLY APPLYING PRESSURE TO THE EDGE OF SAID SHEET TO FLOW SAID SHEET INTO SAID RECESSED PORTION OF SAID DIE.
Claim 2
Independent Claim
78 words
A METHOD FOR DEEP FORMING FLUOROCABON POLYMER SHEET WHICH COMPRISES SUPPORTING A FLUOROCARON POLYMER SHEET IN A DIE HAVING A RECESSED PORTION WITH SAID SHEET EXTENDING ACROSS THE MOUTH OF SIAD RECESSED PORTION, AND APPLYING PRESSURE TO THE SURFACE OF SAID SHEET IN A DIRECTION SUBSTANTIALLY NORMAL TO THE MOUTH OF SAID RECESSED PORTION OF SAID DIE WHILE SIMULTANEOUSLY APPLYING PRESSURE TO THE EDGE OF SAID SHEET TO FLOW SAID SHEET INTO SAID RECESSED PORTION OF SAID DIE.
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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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |