Patent US4778640A successfully refreshed from Google Patents.
US4778640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sequentially molding a razor cap
Assignee: Warner Lambert Co LLC
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Filing: 1987-01-16
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Granted: 1988-10-18
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Expires: 2007-01-16
Abstract
Abstract A lubricating strip having a honeycomb structure of polystyrene and a water soluble leachable shaving aid of high molecular weight polyethylene oxide is molded in situ on a razor cap made of thermoplastic material which has been previously injection molded.
Inventors
- 👤 David B. Braun
- 👤 William E. Vreeland
- 👤 Vincent C. Motta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:08
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/40; B26B21/44; B26B21/443
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
46 words
A method for sequentially injection molding a lubricating strip and at least a plastic razor cap with orifices for anchoring said strip positioned longitudinally across the cap comprising: (a) molding at least said cap with orifices spaced along a recessed area longitudinally along the cap; and
Claim 2
Independent Claim
46 words
A method for sequentially injection molding a lubricating strip and at least a plastic razor cap with orifices for anchoring said strip positioned longitudinally across the cap comprising: (a) molding at least said cap with orifices spaced along a recessed area longitudinally along the cap; and
Claim 3
Dependent Claim
65 words
(b) injecting a mixture of polystyrene, high molecular weight polyethylene oxide and from 0.1 to about 10% by weight of the mixture of a water soluble cosmetically acceptable polystyrene incompatible plasticizer at temperatures sufficient to produce flowability of the polyethylene oxide without substantially reducing its molecular weight during said injecting, said mixture forming and flowing into said orifices to anchor said strip to said cap.
Claim 4
Dependent Claim
65 words
(b) injecting a mixture of polystyrene, high molecular weight polyethylene oxide and from 0.1 to about 10% by weight of the mixture of a water soluble cosmetically acceptable polystyrene incompatible plasticizer at temperatures sufficient to produce flowability of the polyethylene oxide without substantially reducing its molecular weight during said injecting, said mixture forming and flowing into said orifices to anchor said strip to said cap.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the mixture is formed with particulate polystyrene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |